The Caverns of Chaos is the most important dungeon in ADOM, and one of two dungeons that are absolutely essential to visit in order to win the game, the other being the Tower of Eternal Flames. It is the home of the Chaos Gate, which is the source of all the corruption in Ancardia. The Cavern of Chaos is the second biggest dungeon in the game (behind the aptly named Infinite Dungeon), at fifty levels plus side branches, which will be detailed further below.