Tanzania's big-ticket park is the 12,000-square-mile Serengeti, home to the great wildebeest migration and a healthy population of big cats: lions, leopards and cheetahs. During peak season— July and August—when the famous wildebeest river crossings coincide with northern hemisphere summer holidays, the park can be very busy.

There are four main regions in the Serengeti; the Western Corridor & Grumeti, the Central Seronera Valley, the Northern Serengeti (Kogatende, Lobo & Lamai), and the Southern Plains.

There are several private reserves around the Serengeti that offer the same wildlife experience but without the crowds—such as the Grumeti Reserve—but you’ll have to pay top dollar to stay there.

At the heart of the Serengeti lies the Seronera River and surrounding valley. This is a good area for year-round big cats and grazing herbivores.

The northern regions of Kogatende and Lamai, on the banks of the Mara River, are the backdrop for the famed river crossings during summer months. It gets busy during this time, although still quieter than in Kenya's Masai Mara just across the border.