The Ngorongoro is a collapsed crater on the edge of the Serengeti. It was formed when a huge volcanic mountain suddenly crashed into itself at this spot. The crater bottom is at approximately a height of 1700 metres and the side walls are between 400 and 600 metres high, so that the crater edge is at approximately about 2300 metres. The diameter of the crater is between 17 and 21 kilometres. The crater has a total area of 26,400 hectares. About 25,000 large mammals populate the crater, with the highest predator density in Africa among them.
