At just 52km2, Gombe Stream National Park is the smallest of Tanzania’s National Parks. Nevertheless, it is one of the most well-known, as it is the location where Jane Goodall conducted her behavioural research on chimpanzee populations in the 1960s. The Park is located in the Kigoma region and borders Lake Tanganyika, which makes it only accessible by boat. Gombe Stream National Park is popular for its variety of wildlife. Other primates in the National Park include olive baboons, red-tailed monkeys and vervet monkeys. Over two hundred species of bird are present and occasionally hippos and leopards are seen. The clear waters of Lake Tanganyika, the second largest freshwater lake in the world and the second deepest. It is home to almost one hundred species of colourful cichlid fish.