The Ngorongoro Crater is the world’s largest intact, unflooded volcanic caldera, roughly 600 metres deep with a floor around 260 square kilometres. Its enclosed grasslands, swamp and lake support a remarkable density of wildlife, including lion, elephant, buffalo, hippo, flamingo and the endangered black rhino.
The crater lies within the Ngorongoro Conservation Area, a UNESCO World Heritage Site where Maasai pastoralists live alongside wildlife, and is usually visited on a day descent from the rim or from Karatu.