Hang Son Doong is the world's largest known cave, with enough space in some of its passages to fly a Boeing 747 airplane ...

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 ...

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 ...

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 ...

A Twinkling Wonder Tucked away in New Zealand, the Waitomo Glowworm Caves offer a celestial experience. Visitors glide ...

The Extremes crew had trekked for two days through steep valleys covered in lush jungle to reach Hang son Doong cave. Set deep inside Phong Nha-Ke Bang National Park, it is one of dozens of caves ...

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 ...

Son Doong Cave: While scientists are busy searching for life on other planets, references to otherworldly realms can also be found in ancient scriptures and mythologies. Several religious texts ...

Hang son Doong, Vietnam, one of the largest caves on ... Plants can only survive in this spot because light streams through a hole in the cave roof. Travel deeper and you enter a world of complete ...