Visitors seeking unique and quirky attractions should explore America's largest man-made crystal cave, located in the city's ...

Hang Son Doong, located in Vietnam’s Phong Nha-Ke Bang National Park, is the world’s largest known cave, with vast passages ...

Known as Cueva de los Cristales (Cave of Crystals), this hidden chamber in Mexico holds some of the largest natural crystals ...

At dusk, a swarm of bats disperses to hunt in the rainforest surrounding Deer Cave. One of the planet’s largest underground passages, it holds more than two million bats. This story appears in ...

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 ...

A study conducted by Dr. Azriel Yechezkel of the Hebrew University of Jerusalem and his colleagues from the Hebrew University ...

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 ...

Hang Son Doong, the world's largest cave in Vietnam, was discovered in 1990 and is a breathtaking natural wonder. Formed over millions of years, this massive cave features towering stalagmites ...