An additional 167 miles were just explored at Wind Cave, making it the sixth-largest cave system in the world, right behind Jewel Cave in the Black Hills. “One of our explorers, she found an ...

But there’s only one that’s home to the world’s longest cave. That 400-mile wonder can be found under the rolling Southern hills of Kentucky. So, explorers, pack those walking boots.

Nestled in the rolling mountains of Northern Virginia, Luray Caverns is known as the largest cave system in the eastern ...

Take an otherworldly journey through Hang Son Doong, the world's largest cave located in Vietnam. The cave is more than 500 feet tall, 650 feet wide, and 29,500 feet long. Video courtesy of Ryan ...

One of the planet’s largest underground passages ... They had crawled into Cave of the Winds, deep inside a cave system known as Clearwater, where they would search for a passage to Racer ...

The Camuy River flows through the third largest cave system in the world — so extensive, in fact, that it underlies parts of three towns: Camuy, Hatillo, and Lares. Accessible via the main ...

two of the top three largest known caves in the world. To get there, a punishing path and 90 percent humidity test even the fittest hiker. A walk for the fortunate few: Only a limited number of ...

The Makauwahi Cave Reserve, located on an undeveloped swath of coastline on Kauai’s south shore, is the largest limestone cave in Hawaii. The cave’s ceiling collapsed about 7,000 years ago ...

the sound can be heard anywhere from within the cave system, which covers about 64 acres (260,000 square meters). That makes it the largest musical instrument in the world. We’ll save the ...