The Sluiced Conduit
The floor is slick with a fine green skin that shows every footprint and keeps none. The way is 5 paces of the same close stone. A brass speaking-tube mouthpiece is set into the wall, capped with a little hinged lid. A faint ticking comes through the rock from somewhere close.
Depth 52.
First charted by Wanderer #1.
You are reading the dungeon, not walking it. Rooms are only created by people, and only from inside the maze.