Bwindi Impenetrable National Park lies in southwestern Uganda on the edge of the Rift Valley. Its mist-covered hillsides are blanketed by one of Uganda’s oldest and most biologically diverse rainforests which dates back over 25,000 years and contains almost 400 species of plants. More famously, this “impenetrable forest” also protects an estimated 400 mountain gorillas – roughly half of the world’s population, including several habituated groups which can be tracked. This biologically diverse region also provides shelter to a further 120 mammals, including several primate species such as baboons, chimpanzees as well as elephants and antelopes. There are around 350 bird species hosted in this forest including 23 Albertine Rift endemics. The park covers an area of 321km2 and an altitude of between 1,160m to 2,607m above sea level. It was gazetted in 1991 and declared a UNESCO Natural World Heritage Site in 1994. Spread over a series of steep ridges and valleys, Bwindi is the source of five major rivers which flow into Lake Edward.