3 THE TALL HALL. Unlike most places on this floor, the ceiling height is sixteen feet or so. An extra door is present above each regular door. Each extra door appears upside-down, because it is flush with the ceiling and opens opposite the way the lower doors do.
The upper eastern door goes to Room 39, while the upper southern door goes to Area 40. Gravity in Area 3 is normal, even extending to the ceiling, but the gravity in Room 39 and Area 40 are reversed. Both are located on the Third and a Half Floor.