Son Doong Cave

Son Doong is a vast cave passage in Phong Nha-Ke Bang National Park in central Vietnam, near the border with Laos, at about 390 m. It is regarded as the largest known cave passage in the world, with huge chambers and sinkholes that let in daylight. Access is limited to guided expeditions.

Elevation

390 m

Coordinates

17.4572° N, 106.2876° E