The Enchanted Maze

The door opens up into a featureless brick-lined hallway. The floor and the ceiling are the same flat gray concrete, and the hallway continues for some time before splitting up at a T-junction further on. The door, behind you, is blocky and, though wooden, without grain; the knob looks to be painted onto the wood, or at least flat up with it, though it feels like brass when you touch it.

It looks almost exactly like one of those "3D Maze" screensavers from old computers...