World's Largest Cave in Vietnam: National Geographic Photos

There’s a jungle inside Vietnam’s mammoth cavern. A skyscraper could fit too. Hear author Mark Jenkins and National Geographic's Boyd Matson talk about what could be considered the largest cave in the world, the 2.5-mile Hang Son Doong, or “mountain river cave,” along the Vietnam-Laos border. 

See the gallery of photos on the National Geographic website here. Or take a look at a selection of the pictures below.