Construction officially began on the Hon La International Port, valued nearly VND2.3 trillion ($90 million), in the central ...

the longest cave system in the world. Mammoth Cave is a treasure trove for ancient fish fossils, with more than 70 different species identified within its walls, according to a 2024 study ...

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?

Expedition leader Andy Eavis accesses a small algae-covered cave opening. He has been studying ... and for a decade afterward it stood as the world’s largest known cave passage.

SEQUOIA NATIONAL PARK (KFSN) -- After a four-year closure, Crystal Cave in Sequoia National Park is finally opening to ...

World Largest Cave: Mother earth never stops to amaze us. The deeper we go, the more we discover know about it. From forest to rivers to oceans to mountains – there are many such natural bodies ...

After the first day of trekking, the team set up camp in the vast opening of Hang En ... down through a hole in the cave roof, illumining the underground world. Filming this natural lightshow ...

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 ...

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 ...