We set out to explore what might be the biggest river cave we’ve ever seen, and this adventure quickly turned into one of the craziest expeditions we’ve filmed. With permission to park near the cave ...

While there's so much to do above ground in California, this phenomenal cave invites explorers to venture beneath for an ...

Beneath the island’s rainforest, explorers search for new discoveries deep within some of the Earth’s largest, longest, and wildest caves. At dusk, a swarm of bats disperses to hunt in the ...

The Extremes crew had trekked for two days through steep valleys covered in lush jungle to reach Hang son Doong cave. Set deep inside ... around 200 metres beneath the Earth’s surface.

The State of South Dakota has some pretty famous attractions. Mount Rushmore, Crazy Horse Memorial, The Badlands, Black Hills, the list goes on. But one place that doesn't get mentioned nearly enough ...

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 ...

That lake and its chamber, discovered beneath Turkish baths in the capital city of Budapest, were "the biggest active, water-filled thermal water cave and hall in the world" at the time they were ...

At one end of the Gebihe cave system is the Miao Room, part of a large underground stream course, which ranks as Earth’s second largest known cave chamber by area, after Sarawak Chamber in Malaysia.

The largest cave in the northeastern United States is expected to become ... Each spring the caverns open for the season on ...

Among them, the pristine Lechuguilla Cave and the famed Carlsbad Cavern, home to one of North America's largest underground ... to prevent taking microbes from Earth to those other planets ...

Hang son Doong, Vietnam, one of the largest caves on Earth. It is a portal to an extreme world, two hundred metres deep underground. Plants can only survive in this spot because light streams ...

The largest cave in the northeastern United States is ... Each spring the caverns open for the season on Earth Day, which is April 22. “We’ll probably be open to the end of Labor Day weekend ...