While the visitor center at Mammoth Cave National Park is closed during the federal government shutdown, tourism offices from ...

The air is cool and damp. The light shining from behind is low and tinted, while a park ranger's hand hovers over a button. Then, a switch clicks. Light floods a chasm in the stone, a chamber called ...

Roads and trails may remain open during the government shutdown, but many visitor services are expected to temporarily cease.

Mammoth Cave, the world's longest known cave system, stretches 426 miles under Kentucky. The cave's limestone began forming 330 million years ago when the region was submerged under an ocean. Visitors ...

Beneath the surface of an otherwise unassuming National Park, a labyrinth showcases hundreds of millions of years of geologic history. Each shade of tan layered on the walls represents a different era ...