Son Doong Cave - Vietnam - Worlds Largest Cave

Quick facts about a less known & explored cave called "Son Doong Cave" in Vietnam.
Son Doong Cave is a massive underground cave located in the Phong Nha-Ke Bang National Park in Vietnam. It is considered to be the largest known cave passage in the world, with its main chamber measuring over 5 kilometers in length and reaching heights of up to 200 meters.