Ngorongoro crater is just one part of a larger area of interrelated ecosystems consisting of the crater highlands (to which the Ngorongoro Crater belongs) together with larger stretches of plains bush and woodland. Ngorongoro conservation area covers an area of about 8300 sq km. Near its centre is the olduvai Gorge where many fossils have been earthed. Ngorongoro Crater is one of Africa’s best known wildlife – viewing areas. The crater is about 20kms wide and it is one of the largest calderas in the world. Within its walls is a variety of animals and vegetation, including grasslands, swamps, forests, salt pans, a fresh water lake and rich wildlife. The wildlife found includes lions, elephants, buffalos, wildebeests, Thomson’s gazelles, zebras reedbucks.