NHK Documentaries - Vietnam's Hang Son Doong Cave

Seizoen: 3 - Aflevering: 2 / 12 - Eerst uitgezonden: 26 juni 2014 - Episode ID: 973788

The Son Doong Cave in Vietnam was recognized as the world's largest cave in 2010. The program presents amazing images from deep inside the cave filmed for the first time using high-definition cameras.