Roadside turnout with historical marker - Wind Cave, South Dakota National Park Wind Cave National Park, established in 1903. This National Parrk was the first to protect a cave system. Wind Cave, one of the longest in the world, is known for its complex maze of passages & a cave formation called boxwork. Nebraska / South Dakota State Line to the Black Hill National Forest Recration Area Black Hills National Forest stretches for 1.2 million acres, offering outdoor adventure like hiking, biking and camping amidst stunning scenery. Find grassy mountain meadows, towering granite peaks, deep canyons, cascading trout streams and clear, clean lakes.