Named after Lieutenant George Armstrong Custer, the sprawling Custer State Park at 71,000 acres (28,733 hectares) is the largest state park and first-ever in South Dakota. Nestled between the Black Hills, this astonishing nature reserve is known for its wildlife like white-tailed deer, mules, antelopes, mountain lions, burros, elks and more. Don't miss out on the 'begging burros' who earned this name for their tendency to approach cars heading to the park, and then beg for food. There are well-equipped camping grounds available in the park, as well as opportunities for fishing, trekking, swimming, biking, kayaking, and horse-riding.