Here you find a lot of cave elements which youcan use to construct your own dungeon. All materials are PBR, all textures size is 2048x2048.

Triangles count (by asset groups):

Walls elements - 22100 tris

Ceiling elements - 8250 tris

Floor elements - 9800 tris

Stalactites - 3700 tris

Stalactite strips - 1600 tris

Stalagmites - 9800 tris

Little stalagmites - 390 tris