Ngorongoro is a protected area and a UNESCO World Heritage Site located in Ngorongoro District, 180 km west of Arusha City in Arusha Region, within the Crater Highlands geological area of northeastern Tanzania. The area is named after Ngorongoro Crater, a large volcanic caldera within the area. The western portion of the park abuts the Serengeti National Park, and the area comprising the two parks and Kenya’s Maasai Mara game reserve is home to Great Migration, a massive annual migration of millions of wildebeest, zebras, gazelles, and other animals. The conservation area also contains Olduvai Gorge, one of the most important paleoanthropological sites in the world