Photographer: J. Richard Gaskill, MD, Los Gatos, California. With 100 square miles of grassland, swamps, forest, and 2000-foot walls, Ngorongoro Crater is the largest intact caldera in the world. It is a microcosom of East African flora and fauna, with 25 000 large mammals and dozens of bird species, as well as crocodiles, snakes, and lizards.
Zebras, Ngorongoro Crater, Tanzania. Arch Otolaryngol Head Neck Surg. 2011;137(11):1065. doi:10.1001/archoto.2011.201