The wildebeest migration that takes place between Kenya's Masai Mara and Tanzania's Serengeti National Park is celebrated as the greatest natural show on earth, and is a bucket-list experience for lovers of wildlife. Twice a year over two million animals, including hundreds of thousands of wildebeest, zebra, Thomson's gazelle and buffalo, migrate in search of greener pastures. The herds of herbivores move in giant groups, making the Great Migration a sort of buffet for the predators of the region, with animals such as lions, cheetahs, wild dogs and crocodiles on the hunt, often picking on the young or weak animals that bring up the rear. River crossings are particularly dramatic to witness, as the huge herds stampede through the water, wary of crocodiles trying to make a catch.
The best time to experience this migration is between June and August, when the wildebeest cross the Grumeti and Mara rivers with their attendant hungry crocodiles. The exact dates of the migration change from year to year, and the herds spend a few months in the Masai Mara before gradually heading back to the Serengeti in December and January. Most tourists watch the show from a four-wheel drive vehicle but other exciting options include riding alongside the wildebeest on a horseback safari or hovering above in a hot air balloon.