The Serengeti National Park is a large national park in northern Tanzania that stretches over 14,763 km2. It is located in eastern Mara Region and northeastern Simiyu Region and contains over 1,500,000 hectares of virgin savanna. The park was established in 1940. The Serengeti is well known for the largest annual animal migration in the world of over 1.5 million blue wildebeest and 250,000 zebra along with smaller herds of Thomson's gazelle and eland.