Enter.
There’s only one way in and one way out. If you enter, remember your path. Don’t touch the walls or talk to anyone. Doors will open but don’t be tempted by the sparkle and tinkling sounds or the tumbling rumbles that come from within. Stay in the main hallway. And watch your step, pieces of the floor are missing — it would be easy to fall through. When you’ve had enough, turn around and retrace your steps, exactly. If you don’t, you will not remember entering in.