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MagazineMay 27, 2015
Hang Son Doong: The world’s largest cave by Drone
Hang Son Doong, "Mountain River cave" in Vietnamese)is a solutional cave in Phong Nha-Kẻ Bàng National Park in Vietnam. As of 2009 it is the biggest known cave in the world and is located near the Laos–Vietnam border. Inside is a large, fast-flowing subterranean river. Take a look in this cave with this amazing drone video.