Hang Son Doong

Greatest Natural Wonder

The world’s largest natural cave is filled with countless wonders, including amazing large stalactities, giant trees, and rare species of plant and animals.

Hang Sơn Đoòng meaning, ‘Mountain River Cave’ in Vietnamese, is the largest known cave in the world. It has an underwater tunnel connecting it to another cave and an internal, fast-flowing subterranean river. It is located in Phong Nha Ke Bang National Park in Quang Binh province in Vietnam.

In 1991, Hồ Khanh, a local logger first discovered Hang Sơn Đoòng when seeking shelter. In 2009, a British Cave Research team and with Hồ Khanh’s help and using proper caving techniques, pushed exploration into the cave. Since 2013, the public has been allowed to enter the caves.

The cave was formed when river water flowing across the limestone burrowed down along a fault, scouring out a giant tunnel beneath the mountains. At more than 200 meters high (up to 503m in parts), 175 meters wide and 9.4 kilometers long, Son Doong was huge.

Parts of Sơn Đoòng’s interior is illuminated by two dolines (sinkholes) that can flood the cave with beams of spectacular sunlight. Within its depths are the world’s largest stalagmites, giant trees, rare species of plants, rare species of monkeys, hornbills and flying foxes in the jungle section of the cave.



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