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Located near the Laos–Vietnam border, Hang Sơn Đoòng has an internal, fast-flowing subterranean river and the largest cross-section of any cave, worldwide, [2] [3] believed to be twice that of the next-largest passage. It is the largest known cave passage in the world by volume.
Phong Nha Cave: Unknown 7,729 m (25,358 ft) karst UNESCO World Heritage site; Quang Binh province Sơn Đoòng cave: 150 m (490 ft) 9,000 m (30,000 ft) karst Reputed to be the largest in the world; Quảng Bình Province Tam Cốc-Bích Động: Unknown 125 m (410 ft) karst Complex of three caves; Ninh Binh province Thiên Đường Cave: Unknown
This cave has the potential to be the second biggest cave in the world, following the first biggest cave also located in a Phong Nha. In 2017, the first tourists explored the cave, guided by the man who found it. One of over 300 caves in Phong Nha Ke Bang National Park, this cave is probably the least-explored of the many caves open to tourists.
The world's largest cave is so big that a Boeing 747 could fly through its largest cavern unscathed. ... the Hang Son Doong cave in Vietnam was not even encountered until 1991, ...
Three years later, a group of explorers were finally able to propel 80 meters down into the Hang Don Doong cave in Vietnam, a hidden space so big that it could fit a Manhattan city block complete ...
Hang Én ('swift cave' in Vietnamese, named for the birds that nest in it [1]), occasionally referred to as Én cave in English, is a cave in Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site. Én is the third largest cave in the world, after Hang Sơn Đoòng in the same national park, and Deer Cave in Malaysia.
Vietnam holds the second-highest number of World Heritage Sites in Southeast Asia, after Indonesia with ten sites. [3] The Complex of Huế Monuments was the first site in Vietnam to be inscribed on the list at the 17th session of the World Heritage Committee held in Colombia in 1993. [4]
Phong Nha Cave is a cave in Phong Nha-Kẻ Bàng National Park, a UNESCO World Heritage Site in Quảng Bình Province, Vietnam. It is 7,729 metres long and contains 14 grottoes, as well as a 13,969 metre underground river.