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 ...

Mammoth Cave may not be one of the seven wonders of the world, but the national park is one of the wonders of the Bluegrass State. It's "the world's longest known cave system, with more than 400 miles ...

The Nomination files produced by the States Parties are published by the World Heritage Centre at its website and/or in working documents in order to ensure transparency, access to information and to ...

Mammoth Cave National Park in Kentucky is home to the world’s longest cave system, with over 426 miles of mapped underground passages. While here, visitors can hike the Cedar Sink Trail and explore an ...

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 ...