Wind Cave National Park in South Dakota in the Black Hills is one of many beautiful National Parks in western South Dakota. Wind Cave is one of the largest caves in the world, and in addition to the the cave, the national park contains miles of hiking trails.
Your trip to Wind Cave will likely depend on which cave tours are being offered. The wild caving tour is a can't miss experience if you don't mind getting dirty - the tour is strenuous, but very doable without a lot of tight squeezes.