Dark Sun: The Scorched World of Athas
An ominous range of volcanic peaks rising in a ring-like formation north of Urik, the Smoking Crown is a dangerous land, barely habitable. The peaks belch plumes of steam, ash, and cinders that rain down over everything. Lava sometimes streams from the fissures in the slopes, spilling in fiery rivers down the mountainsides. Other fissures vent steam that scalds flesh or colorless, poisonous gases that kill without warning. Despite the danger, slaves excavate the mountains for obsidian and pumice. The quarries are hellish places to work, with unbearable temperatures and jagged black glass on all sides.