GETTING THERE: The closest major airports to the Kentucky park are in Louisville and Nashville, both about 11/2 hours away by car. Many major airlines fly from Washington to both cities, but you'll ...

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 ...

Scientists at European climate monitoring authority Copernicus Climate Change Service have officially confirmed the story you’ve heard: July 2023 was the world’s hottest month on record. Going ...

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 ...

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 ...