The Ngorongoro Crater is part of the Serengeti National Park in Tanzania. One of the natural wonders of the world, it is a National Park enclosure that sits at over 3000m high, in the crater of an extinct volcano. Most impressively it contains an entire ecosystem that is operates almost independently from the rest of the world. As proof of this the giraffes and elephants can no longer climb out of the crater due to its steep sides!