Unga Bungas' Cave is an area in Terrydactyland in Banjo-Tooie. It is location of the Unga Bunga Tribe and also serves as there living quarters. Before having entered into the cave normally from Terrydactyland, the rest of the world is inaccesible due to a bone gate blocking the exit.
Relevance
In the Mayahem Temple world, you learn that the Unga Bunga Tribe has stolen a golden artifact in the shape of Targitzan. In order to get to this item though, you must sneak past the Unga Bunga sleeping in the room filled with noise-making bedding material. Just tilt the control stick ever so slightly to make Banjo tip-toe through the obstacle, followed by jumping up to your prize. Afterwards the Unga Bunga should become distressed because somebody has stolen his stolen goods, and he shall be punished for losing them.
Unga Bunga's Cave is a normal part of your quest. Especially in search of Jamjars and Terry's babies, as a new move and an egg can be found in this area.