On a northern circuit safari, travelers depart from Arusha. Lake Manyara National Park and Tarangire National Park are little more than three hours away and are often incorporated as part of a longer safari. The most visited part of the northern circuit is the Ngorongoro Crater, where wildlife grazes and hunts in one of the largest volcanic craters in the world. If you are traveling from December to April, the annual wildebeest migration...