The Ngorongoro Conservation Area covers 8288 km2 and encompasses the volcanic area around the Ngorongoro Crater - including the still active volcano of Oldonyo Lengai and the famous Olduvai Gorge. Its centerpiece, the Ngorongoro Crater, is the largest unbroken caldera in the world and the first sight of it is breathtaking. The floor of the crater is only 100 sq miles but is home to around 30,000 animals with a high concentration of predators.
The crater supports up to 25,000 large mammals. Grazers dominate: zebra, wildebeest – accounting for almost half the animals - gazelle, buffalo, eland, hartebeest and wart hog. Giraffe, for example, stay away because there is insufficient food at tree level; topi because they compete directly with wildebeest. The unique thing about elephants in the crater is that they are mostly bull herds.