Ngorongoro Crater is the world’s largest unbroken caldera in the world. It is often referred to as “Africa’s Garden of Eden,” and affectionately described as a fish bowl of wildlife. The crater is home to over 30,000 animals including the lion, leopard, rhinoceros, elephant, and hippopotamus of the Big 7. Ngorongoro Crater extends 12 miles (19 km) across in a fairly consistent circumference. It accounts for 102 square miles (264 sq. km) of wilderness and accounts. Additional wildlife calling the crater home include hyenas, zebra, eland, wildebeest, impala, cheetah, and buffalos.