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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.
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
Caves or caverns are natural voids under the Earth's ... in the Gunung Mulu National Park (Miri, Sarawak, Borneo, ... Vietnam. It is 4.6 km (2.9 mi) in length, 80 m ...
The world's largest cave is so big that a Boeing ... the Hang Son Doong cave in Vietnam was not even ... check out the unbelievable 360 degrees panorama journey created by the National Geographic.
Hence, the river caves that are at a lower elevation are much younger than the higher, dry caves as they were more recently created. The river caves in this system such as Ken Cave and Tu Lan Cave are very young, only about 3 million years old. The higher, dry caves (dry Tu Lan and Ton Cave) are much older, and date around 5 million years old.
Karst caves - caves formed in karst, the most common type of cave. [9] Talus caves - piles of collapsed rocks with navigable space inside. [10] Erosional caves - caves formed through erosion not corrosion. [11] Sea caves - caves formed in sea cliffs, typically through wave action. [12] Salt caves - caves formed within rock salt by dissolution. [13]
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.
Elephant ride in the Yok Don National Park, Vietnam. Yok Đôn National Park was established in 1988. [14] It covers an area of 1,155.45 square kilometres (446.12 sq mi) and is in Đắk Lắk Province. Vegetation in the park consists of deciduous forest and semi-evergreen (mixed deciduous) forest, with smaller areas of evergreen forest ...
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