This is a cool map I found, consisting of a discrete cone-shaped mountain dozens of z-levels in height, with a volcano caldera directly to the south of it. I used "Play Now!" to begin the game, and have just gotten started, digging a stairway shaft from the very top of the cone to the ground level, and digging out some hallways at the ground floor. The gem cutter was recruited to become a miner.

There are some simply stockpiles to the north of the cone.