The Northern Safari Circuit is Tanzania's most famous and dramatic wildlife area, and for good reason. It is home to some of the world's most celebrated national parks. The Serengeti National Park, a vast expanse of savanna, is the stage for the annual Great Migration, where millions of wildebeest and zebras embark on a perilous journey in search of fresh grazing. The Ngorongoro Crater, a UNESCO World Heritage Site, is a spectacular, self-contained ecosystem teeming with wildlife, including the elusive black rhino. Other gems on this circuit include Tarangire National Park, known for its massive elephant herds and ancient baobab trees, and Lake Manyara National Park, famous for its tree-climbing lions.