The Ngorongoro Crater is the largest perfect caldera in the world measuring 8,300 square kilometres, with a cross distance of 18 Kilometers (11 miles) across. This outstanding wonder is only one of the attractions within a vast and diverse Ngorongoro conservation area. High mountain forest extends to the lip of the crater. The swamps, ponds and rivers support an ever present population of water birds. Ngorongoro conservation area encompasses three spectacular volcanic craters, the Olduvai Gorge, huge expanses of savannah, forest and bush land. Located in northern Tanzania, it’s home to the “big 5” game, huge herds of wildebeests and zebras that traverse its plains especially during their annual migration. The Ngorongoro Conservation Area (NCA) is also the only place on earth where mankind and wild animals co-exist in harmony. It became a Man and Biosphere Reserve in 1971 and was declared a World Heritage Site by UNESCO in 1979.