Africa is the world's second largest continent. Its largest city is Cairo, Egypt. Long regarded as the cradle of humanity, Africa is also well known for its wildlife, such as elephants, lions, giraffes, baboons, rhinos, leopards, hippos, ostriches, snakes, cheetahs, crocodiles, gorillas, chimps, meerkats, vultures and lemurs. Africa also supports several landscapes such as the scorching Sahara desert, the wildlife-rich Serengeti plains and the verdant Congo jungles.