The Serengeti, together with Kenya’s Masai Mara Game Park, constitute Africa's most famous wildlife park, spread over the enthralling landscapes of northern Tanzania. This is a precious ecosystem, supporting the annual wildebeest migration through the Serengeti and the Masai Mara. The largest mass movement of land mammals on the planet involves more than a million animals following the rains, including more than 1.5 million white-bearded wildebeest and 250 000 zebras. Prides of lions, as well as groups of elephants, giraffes, gazelles, and eland, roam among the photogenic vast grass plains between weird-and-wonderful-looking acacia trees. Aside from traditional vehicle safaris, hot-air ballooning over the Serengeti plains and horse riding safaris are on offer.