0 0 0Stand in front of the map on the wall until the game zooms out enough for you to see the entire map. The room can be found here:
0 0 0In the center slightly above the main room (the room with 3 doors lit with the pink crystals) you will find a room with a map of the cave etched into the wall. Investigate the map and wait as the camera slowly zooms out to reveal the entire map of the cave. Be sure to screenshot this as it will be very helpful.