Bwindi Impenetrable Forest is a large primeval forest in the Virunga Volcanoes mountain range, and is located in south-western Uganda on the edge of the Albertine Rift, the western branch of the East African Rift. It is one of the most biologically diverse areas in the world, where half the world's population of highly endangered Mountain Gorillas live in its jungles in Bwindi Impenetrable National Park. This group is known as the Bwindi gorilla population.