At the end of Hang Son Doong stood the Great Wall of Vietnam, a 200-foot barrier to be conquered by both ladder and rope climbing. In a cave there’s no way to get a signal. There’s no way to ...

Scientists have discovered a new land snail species, Calybium plicatus, in the first sinkhole of Son Doong Cave, underscoring Vietnam’s extraordinary biodiversity. Specimen of the newly discovered ...

A jungle inside a cave? A roof collapse long ago in Hang Son Doong let in light; plants thickly followed. As “Sweeny” Sewell climbs to the surface, hikers struggle through the wryly named ...

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 ...

Hang Son Doong cave — the name means "Mountain River ... born from the compressed shells and skeletons of ancient sea animals ...

Animals were quick to colonise ... Discovered in 1992, Hang Va cave (pictured) is hydrologically connected to Hang son Doong and although much smaller, it hides a remarkable world.

Son Doong Cave in the central province of Quang Binh is ranked sixth out of the best 10 caves in the world, according to the British travel magazine Time Out. Sinkhole Camp 1, situated within Son ...