Badlands National Park: Formed by the geologic forces of deposition and erosion leaving striking geologic deposits containing one of the world's richest fossil beds. 244,000 acres of sharply eroded buttes, pinnacles and spires surrounded by a mixed-grass prairie ecosystem.
Wind Cave National Park: Secreted beneath one of Americas few remaining intact prairies is one of the world's longest caves. While bison, elk, and prairie dogs enjoy the prairie, below, this complex labyrinth of passages contains a unique formation, box work.
Jewel Cave National Monument: The third longest cave in the world, with over 168 miles of mapped and surveyed passages, this underground wilderness reveals fragile formations with glimpses of brilliant color.
Minuteman Missile National Historic Site: Minuteman missiles held the power to destroy civilization, but this destructive force also acted as a nuclear deterrent which maintained peace and prevented war.