Tanzania is known for its vast, scenic wilderness areas. They include the plains of Serengeti National Park and the vast, volcanic Ngorongoro Crater for superb wildlife viewing, and Kilimanjaro National Park, home to the highest mountain in Africa. Timed correctly, the the annual Great Migration, when nearly two million wildebeest, zebra and gazelle traverse the savanna in pursuit of water and new grass, is an awesome sight to behold in Tanzania.