National Park Service, South Dakota.
Bison, elk, and other wildlife roam the rolling prairie grasslands and forested hillsides of one of America's oldest national parks. Below the remnant island of intact prairie sits Wind Cave, one of the longest and most complex caves in the world. Named for barometric winds at its entrance, this maze of passages is home to boxwork, a unique formation rarely found elsewhere.
Wind Cave National Park is located in South Dakota about 11 miles north of Hot Springs, or about 22 miles south of Custer, on US Highway 385. The park Visitor Center, where all cave tours begin, is approximately 1/2 mile west of the highway.