The Ngorongoro Crater is a large volcanic caldera within the Ngorongoro Conservation Area in Tanzania. The conservation area is a UNESCO World Heritage Site.
The crater is the world's largest intact caldera with a diameter of about 19km and floor to rim up to 600m high. It was formed several million years ago when a huge volcano erupted and the cone collapsed in on itself.
The crater is home to more than 25,000 large animals including the endangered black rhino and the largest known population of lions. Although the animals are free to come and go from the crater, it acts as a natural enclosure and is an excellent place to go to view large numbers of animals.
Lake Magadi is a soda lake within the crater which attracts large numbers of flamingos and a wide variety of other birds.