The Serengeti (and its contiguous private conservation areas) is famous as a place of 50-mile views and immense grasslands, on which tens of thousands of grazing animals can be seen in a single glance. Just southeast of the Serengeti is the 15-mile-wide Ngorongoro Crater, where more than 25,000 large mammals roam the grasslands and forests of the crater floor, including lion, elephant and black rhino. The top lodges know how to manage the crater’s notorious crowds. Mahale Mountains National Park, a remote and beautiful reserve located on the eastern shore of Lake Tanganyika, provides unforgettable chimpanzee sightings. And the 1,100 square miles of Tangarire National Park are an intriguing mixture of swamps, acacia woodland and savanna dotted with enigmatic conical hills and crisscrossed by long granite ridges. The perennial Tarangire River allows the reserve to host a large permanent wildlife population, which increases significantly in the June-to-October dry season.