The Ngorongoro Conservation Area is a conservation area situated 180 km west of Arusha, Tanzania. The main feature of the area is the Ngorongoro Crater, which is the world’s largest unbroken volcanic caldera. The steep sides of the crater mean that it has become a natural enclosure for a very wide variety of wildlife, including most of the species found in East Africa.
Aside from herds of zebra, gazelle and wildebeest, the crater is home to black rhinoceros, white rhinoceros, and black-maned lions. Leopards and elephants also inhabit the crater rim.
The area is part of the Serengeti savannah, and adjoins the Serengeti National Park to its immediate south. It was declared a conservation area in 1959 (previously it had been part of the Serengeti National Park) and became a UNESCO World Heritage Site in 1979.