Sistema Sac Actun, the world's largest underwater cave system, spans an impressive 215 miles. This subterranean network of tunnels and crystal-clear waterways is a geological masterpiece with ...

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 ...

Centuries of eruptions on the Big Island have created hidden ... trying to build atop burial caves, says that whenever human remains are found inside a lava tube, they render the entire cave ...

Join us on an epic adventure as we explore one of the biggest mines we've ever seen—complete with towering 70-foot ceilings and endless tunnels! As we navigate the maze-like passages, we stumble upon ...

Inside the pool, illuminated by our headlamps ... ve just completed the first push through what is very likely the largest cave passage in the world.

Nature has given rise to spectacular places, some of them hidden deep inside the mountains. The great cave of La Cuevona de ...

VAIL, Ariz. — Exciting things are happening at Colossal Cave for the first time in decades. The team there has uncovered a ...

The Extremes crew had trekked for two days through steep valleys covered in lush jungle to reach Hang son Doong cave. Set deep inside Phong Nha-Ke Bang National Park, it is one of dozens of caves ...

Some 1,500 years ago, Curaçao's first settlers, the South American Arawak, lived in and around the Hato Caves – the biggest caves ... only permitted in one area inside the caves, although ...

With hundreds of jerseys, hats and even a model of the Linc made from Legos, Dave Bergner of Bristol may be Bucks County's ...

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 ...