Among Africa’s many savanna regions, the Serengeti (or Serengeti Plains) is the most well-known. The Serengeti is a vast, undulating plain that stretches 30,000 square kilometers (11,583 square miles) from Kenya’s Maasai-Mara game reserve to Tanzania’s Serengeti National Park.

The Serengeti is home to one of the continent’s highest concentrations of large mammal species, including lions, hyenas, zebras, giraffes, and elephants. Each year, more than one million wildebeest travel in a circular migration, following seasonal rains, across the Serengeti Plains. Their grazing and trampling of grass allows new grasses to grow, while their waste helps fertilize the soil.