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 ...

The group spent four days wading through hip-high waters before traversing through and camping in soaring caves. At the end of Hang Son Doong stood the Great Wall of Vietnam, a 200-foot barrier 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 ...

This story appears in the January 2011 issue of National Geographic magazine. “Past the hand of dog, watch out for dinosaurs,” says a voice in the dark. I recognize Jonathan Sims’s clipped ...

Ban Tham Cave in Son La is the only mountain tunnel road in Northwest Vietnam, offering a thrilling off-road experience through a dark, rocky passage. A must-visit for adventure seekers! Ban Tham Cave ...

From Hanoi to Halong Bay to Ho Chi Minh City to motorbikes, citadels and its cuisine, these are what Vietnam is famous for.