The lower terrain is mostly composed of an extremely dense layer of Brimstone Slag, with several large parabolic areas of Scorched Remains, and patches of lava and Infernal Suevite. Its ceiling is covered with stalactites and Brimstone Slag spanning across the entire biome. Similar to the Underworld, it has a ceiling layer and a large lower terrain. It can be found in The Underworld on the same side of the world as the Dungeon it is underneath the Abyss on the far edge of the map. The Brimstone Crag is a biome added by the Calamity Mod which spawns upon world creation. The Brimstone Crag biome, as viewed on the map in a large world.
