There is a cave in the world which has its own ecosystem. This cave has a forest, river, rocks, trenches and much more. It was declared the world's largest cave in 2009.

When you buy through links on our articles, Future and its syndication partners may earn a commission. McGinnis' nail tooth (Clavusodens mcginnisi) depicted hunting a crustation in a reef-like ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

If you’re planning your summer holidays and want to save some cash where you can, then accommodation might not be the first thing you think of - especially not five star hotels. But new research ...

This story appears in the June 2019 issue of National Geographic magazine. Italian physicist and photographer Alessandro Cerè took a break from work at the Centre for Quantum Technologies in ...

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 Phong Nha-Ke Bang National Park, it is one of dozens of caves ...

Hit something with a hammer, and it makes a sound. If you’re lucky, it might even make a pleasant sound, which is the idea behind the Great Stalacpipe Organ in Luray Caverns, Virginia.

Note: As of December 2024, the park is closed until further notice. The Camuy River flows through the third largest cave system in the world — so extensive, in fact, that it underlies parts of ...