The Lair of Oboroqoru, the Ape God, is a dungeon located in the general area of Kyakukya. A popup message appears when the player enters the area indicating that they have found the Lair of Oboroqoru the Ape God, and they receive an XP award.
The dungeon levels are a garden-like jungle with outside lighting and a remarkable amount of standing freshwater (appearing in 10 dram pools). It is populated by apes, starting with baboons on the higher levels, with albino apes, cyclopean gibbons, and ogre apes appearing later. (The appearance of ogre apes can constitute a murderous spike in difficulty.) It connects openly to the underground biome on all sides.
Oboroqoru himself appears eventually.