The Numbered Catacomb

The air is dry as paper and utterly without smell. The space opens out into a small chamber, roughly 1 by 3 paces. Someone has turned every skull in one row to face the passage. It took patience. There is a hollow sound behind the south wall, as though the stone were not solid.

Depth 23.

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