Dwarftown is located somewhere between level nine to eleven of the Caverns of Chaos. It is one of the only "safe zones" in the CoC, and many players use it as a base of operations for most of the game. Dwarves seem to have it frequently generated on D:9, which makes it corruption-free (as opposed to slight background corruption on D:10-11). No hostile monsters are ever generated in Dwarftown, except during one particular quest.