Hang Ken

Mammoth cave discovered in Vietnam

The "mountain river cave" is big enough to hold a skyscraper and contains a jungle.  

The spectacular photos 

Also: 

• More on the cave
• Vietnam's new airport
• Agent Orange cleanup

Hang Ken, a cave rediscovered in Vietnam last year, may be the largest in the world:

Surrounded by jungle and used in the Vietnam war as a hideout from American bombardments, it is so large that it could hold a block of 40-story skyscrapers. Its entrance was only rediscovered last year.
The photograph was taken by a British expedition returning to the rugged Phong Nha-Ke Bang National Park near the border with Laos.
The cave, lit from above through a skylight, is one of a network of some 150 connected caverns, many still not surveyed, in the Annamite mountains.

Story  and Slideshow