This is the room of ever-changing doorways. The one you came from is open, static. Only one can be open at a time.
That one is the ladder inside a well, turning into the baleen-plates in a great whale’s mouth. This one here is two trees in a black forest.
You close the door on bright lights and tourists, the square door turns into the scorched chimney of a ramshackle house. It stays like that until you blink, which is when you lose your chance. The abstract doorways turn back into concrete shapes, none of which are the way out.