Vietnam

Arts, Culture & Media

Geo answer

For today's Geo Quiz we went to Vietnam in search of the world's largest cave. Its name is the Hang Son Doong (Mountain River Cave), located in Phong Nha-Ke Bang National Park - the answer to our Geo Quiz. Anchor Lisa Mullins speaks with Adam Spillane, a member of a British-Vietnamese caving expedition that just returned from exploring the cave.