Poorest dungeon I have seen... (seed: 2.1.2.5089157, normal size)

[emppu077]

 

[Calen]

The rest is hidden behind crumbling walls. You'll have to keep testing the walls, floors and ceilings to explore the dungeon fully.

 

[Mental Mouse]

What Calen said. Drink a Dangersense potion, that will clearly show the false walls (along with traps etc).