Badlands National Park

Badlands National Park in southwestern South Dakota protects 242,756 acres (379.306 sq mi; 98,240 ha) of sharply eroded buttes, pinnacles, and spires blended with the largest undisturbed mixed grass prairie in the United States. The Badlands Wilderness protects 64,144 acres (100.225 sq mi; 25,958 ha) of the park as a designated wilderness area and is the site of the reintroduction of the black-footed ferret, the most endangered land mammal in North America.