South Dakota

Custer State Park is home to a herd of 1,500 free-roaming bison.

Badlands National Park consists of nearly 244,000 acres of sharply eroded buttes, pinnacles and spires blended with the largest, protected mixed grass prairie in the United States.

The name "Black Hills" comes from the Lakota words Paha Sapa, which mean "hills that are black". Seen from a distance, these pine-covered hills, rising several thousand feet above the surrounding prairie, appear black.