Some of the most amazing spectacles around the world are hidden deep underground, beneath rocks, sea and even ice.

With so many different tours, Mammoth Cave National Park in Kentucky is ripe for repeat visits and continued exploration. I ...

Floyd Collins squeezed himself inside Kentucky's Sand Cave in hopes of exploring its caverns and turning it into a tourist ...

Knowledge is power,” so the saying goes. Just how knowledgeable are you about the units of the National Park System? You may ...

Cavers spot coin stuck between rock formations — and find ancient Roman site in Spain The chamber of Cova de les Dones where an ancient Roman coin and inscriptions were found. Photo from A.

Nature’s underground wonders have captivated explorers and curious travelers across the country for centuries. From ...

For 16 years, the Buffalo National River has denied explorers access to Arkansas’s longest cave and hundreds of others. Some ...

Floyd Collins entered Sand Cave a century ago today to explore its prospects as a visitor site and became trapped in a passageway not much wider than his chest, dislodging a 27-pound rock that pinned ...

With a vast expanse of natural splendor, South Dakota is rich in history, outdoor experiences and unique activities. In the Mount Rushmore State, visitors will find two of the world's longest ...

There are alot of great caves in the US but there is a hot debate over which one is better Mammoth Cave or Carlsbad Caverns.

MAMMOTH CAVE, Ky. — A new cave tour has opened up at Mammoth Cave ... The cave is notable in several ways because of its wild rock formations and historical relics such as pieces of gypsum, a valuable ...