NPCA shares the latest archaeological discovery at Mammoth Cave National Park, which has a pretty fascinating human history, too.

The formation of the Cave of Crystals is a testament to the incredible forces of nature. The cave, made of limestone, sits ...

The rocks were coated with powdery limestone formation. Nicholson jumped from ... promised further penetration of Carlsbad Cave, the continent’s greatest. Contact us at [email protected] ...

The cave is made of limestone, which is a type of rock that is formed from the remains of marine organisms. The limestone in the Naica Mine is about 260 million years old.

Deep below Earth's surface, rock and mineral formations lay hidden with a secret brilliance. Under a black light, the ...

The vast expanse of the Nullarbor Plain, on traditional Mirning land, is an enigmatic and captivating landscape.

But there is more to this subterranean world than gigantic geological formations ... New Mexico lies an extensive system of limestone caves. Among them, the pristine Lechuguilla Cave and the ...

The limestone in the Marble Arch Caves formed around 330 million years ago You may know what a cave looks like, but can you define it? A cave is a natural underground chamber and the Marble Arch ...

Discover the geology and stunning landscapes of Vietnam in this fascinating tour from Hanoi to Hoi An. Experience tropical jungles, limestone caves, blissful villages and amazing feats of ...