9. Ngorogoro Crater, Tanzania The Ngorogoro Crater is breath-taking natural wonder -- a deep, volcanic crater that creates the largest unflooded and unbroken caldera in the world. About 13 miles across and nearly 2000 ft. deep, it was created when a huge volcano exploded 2-3 million years ago. Today it's one of the best places to see Africa's wild animals. Some 25,000 animals, including lions, rhino, leopards, elephant and buffalo –roam the area. As a result, there are a great many lodges around the crater where visitors can take to take in the animals in their natural habitat.
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