Level 37, commonly referred to as the Poolrooms, is an expansive complex of interconnected rooms and corridors slightly submerged in undulating, lukewarm water. Each area of the level varies greatly in size and structure, ranging from uniform pools and hallways to more open, abnormally-shaped areas. The walls, ceilings, and floors of the level all appear to be constructed from the same white ceramic tile, with the only deviation from this color being the blue-green hue of the water.