2021: Walkthrough door: Louis Koot
Text and screenshots: Louis Koot
Chapter 8: Back to the Beginning:
A: Apartment of Kales
You're back on the ground floor of the Prison Cells Building and you have open up the South door again. Go over the wooden bridge to the door on the other side.
The door is locked. Turn right. You are standing in front of a box where you have to place Key B in.
Take Key B from your inventory and place the key in the box.Turn back to the door and click on the red button and the door will now open.
Enter the hall, but do not walk out through the next doorway yet. Turn left. Through the latticed window you look into another hall and there you see a gray shutter on the wall. Turn around. In the right wall is a window with a closed shutter. Turn left and now walk outside. Turn right and see ..... you are back where you started. If you turn around you will see the crater lake again with the rotating windmill and the wide door.
Stand in front of the wide door again. So to the right of the door is a box with a red button underneath. Click on the gray button of the box to open the box
Take Key A from your inventory and place the key in this box Close the box again via the gray button. Then press the red button and ..... the door will now open.
Go inside. A Scanner monitor hangs in front of the window.
Turn left and you look through the latticed window into the hall where you just were. Turn around and you will see the hatch that you just saw through the lattice window. There is a green button next to the hatch. The green button is connected to the scanner monitor and the monitor is connected to the green power box. If you now click on the green button, the hatch will not open. Click on the scanner monitor to get in the close-up
Click on the red button. The 10 windows of the Annex building will now appear in the monitor screen. Click on the green button. A scanner line appears that goes from left to right and scans the windows and numbers appear in the numeric displays. When the scanning is complete, a blue circle will briefly appear in the right digit box.
NB: If the Blue circle doesn't appears then you have not properly shut down, or leave open one or more windows in the rooms of the Annex building.
Zoom out of the monitor and turn clockwise to the wall hatch. Press the green button and ..... the hatch will now open because the scanner has scanned the windows and found them to be correct. Click the button in the slot up and then grab the Green Crystal 08.
Turn right and step out again. Turn right and walk up to the rails of the rail cart.
Stand on the rails and turn right, 1 click forward to the door, turn right and....... You will now see the back side of the monitor on which, at the beginning of the game, Kales appeared. There is a lever on the back of the monitor. Grab the lever with your hand and then pull the lever down.
Go back to the front side of the monitor and click the green button. A prompt will now appear on the screen.
You will see a circle of which the bottom right segment is divided into squares. The number 3 is in one of the boxes.
Draw the circle over, turn left and go 2 clicks forward to the ravine on the other side of the rail. Then go diagonally left to the entrance of the cave and enter the cave again.
Stand in front of the table again and click again on the map that is on the table. The map will be displayed in your screen again.
Look again at the 3 circles with dashes, which are on the left of the map. Copy them now, if you had not done so before. Put the map away again
Look at the large circle in the cupboard on the small table. Below that circle are 4 red buttons. In the large circle are small round lights that light up when you click on the 4 buttons. If you study that large circle, you will notice that all those small lights are in 3 rings. Each ring has 8 lights, so there are 24 lights in total. If you see the circle as a clock, the lights are at 12 o'clock, 2 o'clock, 3 o'clock, 4 o'clock, 6 o'clock, 8 o'clock, 9 o'clock, 10 o'clock.You still have no idea what to do here, so turn around and exit the cave. Turn left and then turn right. and see .... the door at the end of the ravine is now open and it turns out to be an elevator. However, first look up now, via the up finger. High above the elevator, you will see a small window with a large monitor next to it.
Look down again and then step into the elevator. The back door of the elevator is locked. Turn left. You see 2 green buttons and a gray hatch. The right green button is attached to a green pipe. Click on the left green button and then click on the gray hatch. The hatch will open and you will now see an orange button. Press the orange button and .... with the elevator you now go up.
When the elevator has stopped again, you look out over a path above the ravine. Stay in the elevator. Turn left to the window and then look down in the window. This isthe window that you just saw outside.There is a box on the outside of the window sill. There are 2 A's in the box and a button on the left and right. We have seen this before, but then it said LN in the box.
Click the left button until you have the left A changes to the L. Click the right button until you have the right A changes to the N.
Look up again and turn right and now get out of the elevator. Follow the path left to the door of the:
Apartment of Kales:
Open the door via the red button and enter. You end up in the office of Kales:
Continue to the table. There are 2 paintings of Rhem on the wall above the table. You probably know the places in those 2 paintings if you have also done Rhem 1 and Rhem 2. On the table is the drawing that you gave to Kales at the very beginning. There is also a blue telephone on the table. Look at the drawing again for a moment and then put it back. Click on the blue telephone and the thing will appear in your screen. Click on the middle button and "1" will appear in the screen. Click on the top button to see and listen to the first message from Kales.
Kales tells you that you are looking for a Relic and that this Relic is a Black Crystal. To find the path to the Black Crystal you need 10 Green Crystals. Kales also tells you that he has found a Golden Ball that you may need. This Golden Ball is in Kales's office.
When you have watched the first message from Kales then click on the right button and then the top button again to view all the other movies in the messenger window. There are a total of 6 videos that you can watch in this way. Once you have watched all the videos in the messenger, click the bottom button and put the telephone back on the table using your magnifying cursor on the screen. Then turn clockwise to the monitor in the right wall. This is the monitor that allows Kales to view the entrance to Rhem and thus talk to you at the beginning of the game. Turn right and then go diagonally left 2 times to the Bedroom. Continue to the bed and then look down. On the left is a pillow on the bed. Click with your hand on the pillowto move the pillow. Under the pillow is a notebook and white paper.
Click the Notebook and then open it. Scroll through the pages. There is a circle with lines on each page.
There are 24 pages, so 24 circles. Each page also includes hearts, triangles and diamonds, asterisks and other symbols. Now find the 3 circles in this booklet that you have seen on the map in the Cave. Then write down which symbols are on those pages. The 1st circle has stars with 6 points and triangles. The 2nd circle has crowns and asterisks. The 3rd circle has 9-pointed stars and diamonds.
Close the book but do not put it back yet. There is also a paper under the pillow. Click the paper. It turns out to be a Symbol Card. It shows the positions of the symbols you just saw in the notebook. Hey .... doesn't this circle look like the circle with lights in the cave? Draw it over because you cannot take the card with you.
Put the card and then the notebook back. Look up and turn left to the Scanner on the wall. Click on the orange button and Kales will appear in the screen again.
Kales says you can have the crystal scanned for authenticity in the scanner. If the crystal is real, the lamp will turn yellow. Turn left and now walk onto the balcony of the bedroom. If you are standing on the balcony you can look down and you will see the rail of the rail cart. On the wall hangs the map of this part of Rhem, so of Rhem 3. A little late ... but better late than never.
The map shows all areas and structures you have already visited, such as the PrisonCell Building with the Annex, the Reservoir and the Corridor Building. Turn right again and walk back into the bedroom and then leave the apartment again to the elevator. In the elevator, turn around and click on the orange button to go back down with the elevator.
When the elevator is down, click the left green button again to open the left elevator door. Turn left and take 2 steps out of the elevator. Then turn around to the elevator and look up again to the window and see ..... on the large monitor next to the window you now see a circle with squares and the number 4. Draw it over
Look down again, turn right and then go diagonally right back to the Cave. Enter the cave again and walk back to the table.
The Golden Ball:
This is the office that Kales was talking about and this is where the Golden Ball should be hidden. Probably the Golden ball is behind the hatch that hangs above the table and that is connected to the circle box via a green cable. You now need the drawing of the circle with the symbols of the notebook and the pages where the 3 circles of the map are on. So take those 2 drawings at hand....
The drawing with the large circle saws that the circle is divided into rings containing symbols. The circle also has "spokes" that are framed and those "spokes" also contain symbols. Those "spokes" are at 12 o'clock, 2 o'clock, 3 o'clock, 4 o'clock, 6 o'clock, 8 o'clock, 9 o'clock and 10 o'clock. Sa those "spokes now correspond with the lights that are in the circle of the cupboard. Name the rings of the circle, from outside to inside A, B, C, D, E.
Ring A of the circle has asterisks. Ring C of the circle has triangles. Ring E of the circle has diamonds.
Hey .... those are the symbols you saw on the 3 pages of the notebook that have the Circles that are also on the map, which is here on the table.
So ring A is for the 2nd circle, ring C is for the 1st circle and ring E is for the 3rd circle. Now determine the correct "hours" for each circle........... Look in the "spokes" of the circle for the second symbol on the pages of the notebook. Then you see that the crowns for circle 2 are at 6 o'clock, the 6-corner stars of the 1st circle are at 8 o'clock and the 9-corner stars for the 3rd circle are at 10 o'clock. Now combine all of this with each other and you know the solution to the puzzle.
Number the 4 buttons of the circle box, from left to right, A, B, C, D. If you click on button A, the lights in the outer ring will light up. Button B is for the lights in the 2nd ring and button C for the lights in the 3rd ring.
Click on button A until the light in the outer ring is green at 6 o'clock.
Click on button D and......
the hatch of the left cupboard slides open and in that cupboard is the Golden Ball. Take the Golden Ball.
B: Back to the Corridors Building:
Turn around and exit the cave and go right and back over the rails and walk to the 2 doors of the two halls. The door to the left hall will be closed. So close the door of the right hall via the red door button under the box of key A and ... the left door opens again.
Enter the left hall again and open the other door through the red door button and then walk back over the bridge to the South Door of the Lower Floor of the Cellen Building. Open the South door and step inside. Turn left and then go back through the exit in the corner to the tunnel near the rail cart. Open the tunnel hatch, crawl back through the tunnel to the courtyard and go back to the Lamp Room:
Enter again through the South door and inside you open the North door again. Then go through the North door again, over the bridge, open the next door and continue through the elevator tunnel to the elevator. The elevator is still upstairs and the elevator door is closed. Open the elevator door via the bottom button and then descend again via the ladder in the bottom of the elevator shaft.
Then follow the stone corridor to the small round elevator. Go up 1x again with the small round elevator. Turn left at the top and follow the path to the ladder.
Go down the ladder to the lake and then walk over Ladder A to the ground floor of the Corridors Builing
C: Corridors Building
In the ground floor corridor, turn around and press the green button to raise Ladder A again. Then go up the ladder in the niche to the 1st floor corridor. Climb up via the inside of Ladder A to the 2nd floor. On the 2nd floor, press the up arrow button of the lift platform buttons again twice to move the lift platform to the 3rd floor.
Then climb back to the 1st floor via ladder A and then back to the ground floor via the ladder in the niche. Turn left and walk through the hall to the door, open the door and follow the hall further out to go over Ladder B to the Zigzag path and then straight ahead to the door of the:
D: Huts Cave:
The Bear Statues:
Open the door and enter. Now walk all the way straight ahead, to the door past Hut 1. Press the green button to open the door and .....
..... this also turns out to be an elevator. Get in the elevator. Before you press the elevator button in the elevator to go up, first turn right. There is another door in the elevator, but it won't open now. So press the elevator button and you will now go up with the elevator. When the elevator has stopped, turn around and ... you are standing in front of a Bear statue. This is:
Bear Statue 1:
The Bear statues only accept the correct item. So if a Bear statue does not accept the item you are offering, you are in front of the wrong statue. The Bear statue has folded his hands as if he expected something in it. You can push the nose of the Bear statue to pen up the bears mouth. Take the Isocaeder from your inventory and place it in the hands of the Bear statue, then press the nose and ... you will see the teeth of the statue. There are 8 teeths , 4 above and 4 below. All teeths are now white. If you click on a teeth then the teeth will turn black. If you click on a black teeth again, the teeth will become white again.
You have to blacken some teeth. You can find the clue for this theeth puzzle ogf Bear 1in Book 3 of the library Column Map. Book 3 is in Column 3 of your column map and contains 5 pages of geometric figures. The figure on page 3 is the Isocaeder.
Take a look at this figure. You do need a lot of imagination again ..... but the bottom gray edge of the geometric Isocaeder can be seen as the Teeth of the Bear statue 1. You will see that the top row of teeth must remain white and that in the bottom row the 1st, 2nd and 4th teeth must be black.
Return to Bear 1. Number the teeth, from top left to bottom right, 1 to 8. Make teeth 5, 6 and 8 black
Turn left and open the elevator door. Take 1 step out of the elevator and turn right. You look through a long corridor, go 1 click forward and turn right.
Bear Statue 2:
Take the Golden Ball from your inventory and place it in the hands of the statue. Press the nose to see the teeth. Number the 8 teeth, from top left to bottom right, 1 to 8. Then make the teeth 1, 4, 5, 8 black. This is the black and white pattern you saw on the painting in the Paintings room.
Turn left and go forward 1 click and turn right again. Another hallway. Go forward 1 click again and then turn right again.
Bear Statue 3:
Take the cylinder from your inventory and place the cylinder in your hands. Press the nose and then blacken the following teeth: 4, 5, 7.
This is the black and white pattern you saw in George Washington's portrait.
Turn left again, 1 click forward and turn right, forward and right again.
Bear Statue 4:
Place the Double Cone in the statue's hands and press the nose again.
Blacken the teeth according to the teeth pattern of the skull painting in the cave painting room. So only blacken teeth 2
Turn around to the other wall and......you have found the 3th Circle clue for the entrance puzzle of the new area.....Copy it.....
Also notice and copy the position of the 4 screws with witch the panel is screwd on the wall
Turn left, forward, left, 2 times forward, left, 2 times forward (left is the elevator again), right and 2 times forward.
Turn right and click on the tree and then take Leaf F. Note the bird whistles you hear again: short, short, long.
Turn around and step into Hut 4 and click the red button to open the middle round window and then click the button in the slot up and then take the Green Crystal 06.
Go back to the elevator but not enter it yet. Turn left again before the elevator and then follow the corridor all the way straight ahead, outside, and go to the gray building. Press the red door butto, but ... the door won't open. But we'll come back here later.
D: Back to the Library:
Go back to the elevator, open the elevator door and go back down with the elevator. The 2nd door in the elevator still won't open, so get out of the elevator and follow the path back to the entrance of the hut cave and go back outside. On the Zigzagpag you go right to the gate. Open the gate in the gate and then step through the gate and climb down the water pipe again via Ladder 1. In the water pipe you climb up again via ladder 2 and via the outside of Ladder A to the top floor of the corridor of the corridor building.
Follow the top corridor to the other side and then go through the door back into the Library. Walk to the bookshelf with the Red Book on it.
Library: Leaves Book puzzle:
Open the red book. The book has 8 empty pages. The Red Book is connected via the green pipe to the door button of the still locked door in the hallway around the corner. You have to activate that door button now. During your walk through Rhem, you collected 8 green leaves, A to H. With each leaf you heard a bird chirping 3 tones each time.
In the radio room, at the Pavilion, you heard those tones in the correct order via the radio. That order was:
You now have to place a Leaf on each page of the red book and you have to do that in the order of the bird whisles as you heard it on the radio. So place:
Once you have done this, turn left and walk back through the hallway to the closed door.
Click on the orange door butto and ..... the door will now open.
Go down the ladder and turn left at the bottom. On the left wall of the tunnel you see the 4th circle clue for the new area. Go check it out and copy it over
Also notice and copy the position of the 4 screws with witch the panel is screwd on the wall
Then turn around and follow the tunnel and go over the bridge.
if you look to the left halfway through the bridge, you will see the zigzag path and follow the tunnel further to the end.
On the left is a gray door with a red door buttonb and a yellow door hook.
On the right is a round blue green crystal hatch. Click the button in the slot up and then grab the Green Crystal 01.
Turn around to the door. Click the door hook up and press the red button to open the door and see....
you are back above the Hut Cave, at the Bear Statue huts. So this is the door you couldn't open.
You can't go out here because the Huts elevator isn't up here, but down
E: Back to the elevator in the Huts Cave:
Turn around and follow the tunnel back to the ladder and climb back up to the library hallway. Exit the library and walk through the top corridor of the Corridor Building back to Ladder A. Climb out the window and descend back into the water pipe via the outside of Ladder A and Ladder 2. Go back to Ladder 1 and press the orange button again at Ladder 1 to lower Ladder A again. Climb up again via Ladder 1 to the zigzag path and go via Ladder A back into the ground corridor of the Corridor Building. Then raise Ladder A again via the green button in the corridor. Go to the door on the other side of the hall, open the door and walk over Ladder B and the zigzag path back to the door of the Hut Cave.
Open the Hut Cave door and enter the cave again. Continue to the elevator, open the elevator door and take the elevator back up to the Bear Statue level. Exit the elevator again and then follow the right corridor all the way to the door at the end, so the door that you could not open from this side before but that you just opened on the other side. Now open the door and step back into the tunnel. You are back at the hatch where you just took the Green Crystal 01 from and the Elevator is up now
Follow the tunnel back, across the bridge, to the ladder. Climb up the ladder again to the hallway of the Library and step back into the Upper Corridor of the Corridor Building. Follow the corridor back to Ladder A. Climb down the outside of Ladder A again into the water pipe and go back to Ladder 1. Press the orange button again to lower Ladder A again. Climb up again via Ladder 1 and then go back into the bottom corridor of the Corridor Building via Ladder A. Then raise Ladder A again via the green button.
Follow the corridor to the other side and go via Ladder B again to the door of the Huts Cave. Enter the Huts Cave again and walk straight on to the elevator. The elevator is now upstairs and it must be so. Open the elevator door via the green button and .... in the bottom of the elevator shaft you will now see a manhole cover. Step into the elevator shaft and then turn right and., .... on the wall of the elevator shaft you now see a drawing of 3 triangles with dashes in a yellow frame. Draw it over again.
Turn right again and step out of the elevator shaft. Go back to the Corridors Building.
F: Ball machines puzzle
So you enter the Corridfors Building via Ladder B again. Walk to the door and then open the door via the bottom button. Follow the ground floor corridor to the ladder niche and climb via the ladder in the niche to the 1st floor. Then climb up via the inside of via Ladder A to the 2nd floor. Lower the lift platform to the 1st floor. Climb back to the 1st floor via Ladder A and then follow the corridor to the lift platform. Then turn right and follow the side corridor to the end. Turn left, open the door and walk down the stairs and then down the ladder to the Male / Female Room.
Ball Machines corridor
Turn left. You are again at the entrance of the Ball machines corridor. Turn left again and step through the gate onto the balcony. Turn left and ... you are in front of the pull ring with which you activate the ball machines in the ball hall. So click on the pull ring to activate the ball machines now
Now go into the Ball machines corridor and walk to the hatch at the back of the hall.
Above the hatch you read: GA FUPAC ALLUZ FY QUAFA PAAGY.
Say ..... what illegible words these are. But ..... now think back to the male portraits in the rooms of the Annex of the Prison Cells Building. All those men made hand signals with their hands and book 14 of the library contains the letters of all those hand signals. So you can divide the words above the hatch into those hand signals. It then becomes: GAF. UPA. CAL. LUZ. FYQ. UAF. APA. AGY. The women in all those portraits in the rooms of the Annex wear black and white earrings.
There are 4 ball machines in the corridor. The machines are connected to each other by a green pipe and to the hatch button. Machine 1 hangs right in front of the entrance. Machine 2 hangs over machine 1. Machine 3 hangs to the right of the hatch and machine 4 hangs to the left of the hatch.
Each machine has a cup with white balls and a cup with black balls. There is a green button on the hose of each cup. Between the cups is a red triangle button and 3 lights that turn white or black depending on whether you click on the button of the white cup or the button of the black cup. The red button is to reset the ball machine if you go wrong.
You are now supposed to put the black and white code of the earrings of the women that belong to the men who GAVE the hand signals UPA. CAL. LUZ. FYQ. UAF. APA. AGY, in these 4 Ball Machines. But then the other way around, so find out which men are making these hand signals and then look at the earrings of the woman hanging next to them. Then reverse the earring code, because you must enter the reverse code.
Ball machine 1:
On this you have to enter the earring code that goes with the hand signals GAF UPA from the man from the Purple Flower Room. The woman's earrings were White, Black, Black, so the code becomes: Black, Black, White. Click on the green button of the: black cup, black cup, white cup.
Turn around to:
Ball machine 2:
On this you have to enter the earring code that belongs to the hand signals CAL LUZ from the man from the White Flower Room. The woman was wearing White, Black, White earrings and if you reverse this code it will remain the same, so click on the green button of the: white cup, black cup, white cup.
Turn left and go to:
Ball machine 3:
On this you have to enter the earring code that belongs to the hand signals FYQ UAF of the man from the Green Flower Room. The woman was wearing Black, Black, Black, earrings. So click 3 times on the green button of the black cup.
Turn to the:
Ball machine 4:
Here you have to enter the earring code that belongs to the hand signals APA AGY from the man in the Black Flower Room. The woman's earrings were White, Black, Black. So click the green button of the: black cup, white cup, white cup
Turn to the hatch. Click on the orange button under the hatch and .... the hatch will open and you will see another round crystal hatch. Click the button in the slot up and then grab the Green Crystal 07.
G: Back to the rail cart:
Turn around and go back to the Male / Female room. Turn left and climb up the ladder again. Walk up the stairs again, open the door and follow the corridor back up the ladder niche. Go down the ladder in the ladder niche back to the ground floor corridor and then turn right around the corner again. Lower Ladder A again via the green button and walk over Ladder A to the ladder on the other side. Climb up the ladder again and go through the gate and then turn left to the small round elevator. Go down again with the round elevator and follow the stone hallway back to the ladder in the elevator shaft. Climb back up the ladder into the elevater tunnel
Well ... you can't get out of the elevator tunnel, so turn back to the elevator shaft and lower the elevator again.
Get in the elevator and exit the elevator on the left and cross the drawbridge and the tunnel to the west door of the Lamp Room.
Open the West door and step back into the Lamp Room. Turn right, click on the button of the South door to open the South door and walk across the courtyard back to the Stone Staircase of the middle floor of the Cell Building. Turn clockwise to the round hatch of the pipe tunnel. Now do not press the orange button, but click on the round hatch to zoom in on it.
The Round Hatch puzzle
There are 8 round buttons in the hatch. The buttons are on: 12 o'clock, 2 o'clock, 3 o'clock, 4 o'clock, 6 o'clock, 8 o'clock, 9 o'clock and 10 o'clock.
Now open book 11 in your Library column map. This is the book with circles with dots in it. Open page 3 of this book.
On the left page are 3 circles with Golden Balls. The middle circle has the 8 dots in exactly the same places as the 8 buttons in the hatch. In the circle you will see the order in which you have to click the buttons in the hatch, which is: 2 o'clock, 3 o'clock, 8 o'clock, 6 o'clock, 10 o'clock, 4 o'clock, 12 o'clock, 9 o'clock.
Return to the hatch and then click on the 8 buttons in this order: 2 o'clock, 3 o'clock, 8 o'clock, 6 o'clock, 10 o'clock, 4 o'clock, 12 o'clock, 9 o'clock. Zoom out and press the orange button. The hatch opens but the hatch on the other side of the pipe now remains closed. Crawl into the pipe and you will now see a clue on the inside of the other hatch. Copy it. It's a circle with an inverted triangle and a dot on the northwest.
Turn around, crawl back out of the pipe. Turn around again to the pipe and click on the orange button again to close the front hatch. The buttons then reset. Click on the orange button again to open both hatches and crawl through the pipe to the rail cart. Turn around to the tunnel. Close the hatches via the green button.
Click on the hatch to zoom in. Also on this side of the tunnel the hatch has 8 buttons and they are also here at 12 o'clock, 2 o'clock, 3 o'clock, 4 o'clock, 6 o'clock, 8 o'clock, 9 o'clock and 10 o'clock. Look again at page 3 of book 11.
This time the middle circle on the right page is the correct circle. You can see the order in which you have to press the buttons of the hatch: 10 o'clock, 3 o'clock, 8 o'clock, 2 o'clock, 12 o'clock, 9 o'clock, 4 o'clock, 6 o'clock.
So do this and then press the green button to open the hatch, so the other hatch is now closed. Crawl into the tunnel and draw the clue that is drawn on the inside of the other hatch. It's an inverted Y with a dot on the south. Draw it over again.
Turn around and crawl out of the tunnel again and press the green button twice to open both tunnel hatches again. We are not going back through the tunnel. Turn right and go to the door to the right of the tunnel. Stand right in front of the door and then turn left. You look back at the rail cart and you are again in front of the blue panel with the brown handle, the 3 colored bars and the green button.
This is the:
Rail cart Control Lever Puzzle:
You have to click in the correct order on the 3 colored bars and the brown handle as indicated on the outside of the balcony door in Hall A of the top floor of the Cell Building. Take that drawing at hand to look at it again
This drawing gives you the solution for this puzzle from left to right...it tels you the order on witch you must click the brown handle and the 3 colored bars
Click on: brown handle, yellow bar, blue bar, brown handle, yellow bar, brown handle, red bar, yellow bar, red bar, brown handle, blue bar, green button and ...... Behind the rail cart a gate gets closed. The door in front of the rail cart will open and .... the rail cart disappears through the opened door.
Go to where the rail cart was. You now see a hatch between the rails.
Zoom in on the hatch. Open the hatch and then descend the ladder.
You have arrived in:
2021: Walkthrough door: Louis Koot