This world has a named mountain with a ton of z levels for mega-construction projects. however, the dwarf-civ is all but non existent, and the mountain is isolated from the rest of the world. no trade, no invasions. just you, the local wildlife, and a giant pile of rock.

Chasm, underground river, adamantine, sand. Sedimentary layer, no flux or magma

Included is the save, raw/objects folder, and some screenshots