Here you can find a huge dwarven achitecture kit (include 80 meshes) which you can use to make your best dungeon or fortres.

Triangle counts:

Dwarven columns - 4200 tris

Dwarven column additional elements - 3300 tris

Dwarven details - 1900 tris

Dwarven floor elements - 2650 tris

Dwarven walls - 2160 tris

Dwarven wall elements - 790 tris