Hang Son Doong cave — the name means "Mountain River" — is young compared with other limestone caves. It formed 2 to 3 million years ago inside the biggest limestone massif in Asia, a colossal ...

Vietnam is home to the world's largest cave. It's so vast that it has its own weather system and could fit an entire city ...

A series of photos by Hai An capture a four-day journey to Son Doong, declared the world's largest cave, by Miss Universe Vietnam 2017 H’Hen Nie last month. The thrilling tour covered over 20 ...

Photographer John Spies, 59, spent nearly a week living inside Hang Son Doong cave in Vietnam, snapping photos of rock formations, bright green vegetation and reflective pools, Barcroft Media reports.

H ang Son Doong in Vietnam is the world’s largest cave — so huge it has an underground river running through it and massive stalagmites more than 230 feet high. (Not to mention the fact that ...

The world's largest cave passage — a half-mile block of 40-story buildings could fit within it — was discovered deep within a remote Vietnamese jungle in 2009. The Son Doong cave, as it's ...

Measuring Son Doong Cave took years. The first expedition into Son Doong ("Mountain River") Cave was stopped by a 200-meter barrier that the spelunkers dubbed the "Great Wall of Vietnam." ...

Hang Son Doong, located in Vietnam’s Phong Nha-Ke Bang National Park, is the world’s largest known cave, with vast passages so immense that a Boeing 747 could fly through them.This limestone ...

Photographer Ryan Deboodt explored the Hang Son Doong caves in Vietnam, filming the journey using a GoPro camera attached to a drone. The resulting video is awe-inspiring, a soaring look at the ...