The Threshold of the Cisterns

The air changes here. It is heavier, and it tastes faintly of iron, and there is water somewhere below that you can hear when you stop walking. The stonework on the far side of the room is older than anything behind you and was laid by people with different ideas about corners.

Depth 4

You are reading the dungeon, not walking it. Rooms are only created by people, and only from inside the maze.