Explorers Discover a 'Jungle Cave' in Vietnam (BLOG)

For decades, geologists have known that Vietnam is home to some of the world's most spectacular caves, many of them largely unexplored. Now husband-and-wife cavers have documented perhaps the world's largest: Hang Son Doong, big enough in places to accommodate a New York City block of skyscrapers.

A half-mile block of 40-story buildings could ...

A climber ascends a shaft of light in Loong Con, ...

Navigating an algae-skinned maze, expedition ...

Moss-slick boulders and a 30-foot drop text author ...

Mist sweeps past the hills of Phong Nha-Ke Bang ...

The cave in the Annamite Mountains contains a river and jungle (its name translates to "mountain river cave") and even its own thin clouds, and its end remains out of sight. It's part of a network of about 150 caves in central Vietnam near the Laotian border.