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