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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.
The name Phong Nha-Kẻ Bàng is composed of Phong Nha (cave) and Kẻ Bàng (limestone forest). Phong Nha is widely explained as originating from Hán Nôm 风 牙 , which means wind-tooth (wind flowing from the cave and stalactites and stalagmites inside the cave looking like teeth).
Phong Nha – Kẻ Bàng is located in the middle of the Annamite Range, and shares its boundary with Laos's Hin Namno National Park to the west. Phong Nha – Kẻ Bàng has a diverse limestone karst ecosystem, containing terrestrial and aquatic habitats, forests, savanna, and large caves.
Formed in Carboniferous/Permian limestone, the main Sơn Đoòng cave passage is the largest known cave passage in the world by volume – 3.84 × 10 7 m 3 (1.36 × 10 9 cu ft), according to BCRA expedition leader Howard Limbert. It is more than 5 kilometres (3.1 mi) long, 200 metres (660 ft) high and 150 metres (490 ft) wide.
The entry of Phong Nha Cave. Phong Nha township is located by Son River and contains part of Phong Nha-Kẻ Bàng National Park, a UNESCO's World Heritage Site. [1] Tourist service facilities for this national park are located in this township. Phong Nha was a fierce battlefield during the Vietnam War. The local inhabitants live mainly on ...
Phong Nha holds several world cave records, as it has the longest underground river, as well as the largest caverns and passageways. [8] Following UNESCO listing of this park, the number of visitors to this province changed significantly. [23] Tourists mainly visit Phong Nha, Tien Son and Thiên Đường caves and Hang Én.
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
Right: Largest cave in the world in Phong Nha-Kẻ Bàng Phong Nha-Kẻ Bàng National Park was declared a national park in 2001. It covers a core area of 857.54 square kilometres (331.10 sq mi) and a buffer zone of 1,954 square kilometres (754 sq mi) in Quảng Bình Province as it has the world's two largest karst regions with 300 caves and ...
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