Wind Cave

One of the nation's oldest national parks, Wind Cave became part of the park system in 1903. The present size is 28,295 acres above ground. Today, Wind Cave National Park actually houses two worlds, the terrain and wildlife of the surface and the hidden labyrinth beneath the surface. The cave sysem is the fourth-largest in the world, with more than 125 miles of rare and unusual boxwork, frostwork and popcorn formations.