31 Bucket List National Parks That Are Surprisingly Underrated

19. Wind Cave National Park (South Dakota): Below and Above Ground Wonders

Beneath the rolling prairies of the Black Hills lies Wind Cave, one of the planet's longest and most complex cave systems, renowned for its rare and intricate 'boxwork' formations – delicate calcite fins resembling honeycombs. Various guided cave tours reveal these subterranean wonders. But don't miss the park above ground! The surface protects a vibrant mixed-grass prairie ecosystem where visitors can easily spot bison herds, pronghorn, prairie dogs, and elk, offering two distinct park experiences in one compact, often overlooked location.