This 2,403 square miles of Southern California land is located in the Mojave Desert. It spans woodland, rugged mountains and canyons and shelters animals like mountain lions, coyotes and bats. The huge, steep sand mounds of the Kelso Dunes are known for making "singing" sounds. Cima Dome is a large granite mass covered with Joshua trees. The Hole-in-the-Wall cliffs are peppered with holes and crevices.