Serengeti National Park is a World Heritage Site teeming with wildlife: over 2 million ungulates, 4000 lions, 1000 leopard, 550 cheetahs and some 500 bird species inhabit an area close to 15,000 square kilometers in size. Serengeti National Park, national park and wildlife refuge on the Serengeti Plain in north-central Tanzania. It is partly adjacent to the Kenya border and is northwest of the adjoining Ngorongoro Conservation Area. It is best known for its huge herds of plains animals (especially gnu [wildebeests], gazelles, and zebras), and it is the only place in Africa where vast land-animal migrations still take place. The park, an international tourist attraction, was added to the UNESCO World Heritage List in 1981.