The second door on the left...
At first the door resists your efforts to open it, having swollen like a water-bound corpse. When at least it relents, you find yourself looking at the mundane contents of a walk-in supply closet. Stacks of yellow and moldy linens, boxes of rat-chewed candles, and moth-eaten pillows line the shelves. A dark discoloration in the ceiling suggests water, or perhaps some other liquid, has fouled the closet.