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This increases the potential volume of the cave by more than 1,600,000 m 3 (57,000,000 cu ft). [15] The cave contains some of the tallest known stalagmites in the world, which are up to 80 m (260 ft) tall. [16] Behind the Great Wall of Vietnam were found cave pearls the size of baseballs, an abnormally large size. [17]
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
The newly discovered cave was acclaimed by the British scientists as "the largest and the most beautiful cave in Phong Nha-Kẻ Bàng area". [ 11 ] [ 12 ] On June 1, 2006, the Ministry of Culture and Information of Vietnam issued a stamp collection of depicting various landscapes found in Phong Nha-Kẻ Bàng.
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.
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]
First cave. Tam Cốc, literally "three caves", consists of three natural caves — Hang Cả, Hang Hai, and Hang Ba — on the Ngô Đồng River. [2] [3] Tourists are taken in small boats along the river from the village of Ván Lám, through rice fields and limestone karsts, through the caves, and back. Local women serve as guides and ...
The cave has its own jungle, waters, beach, and climate. [2] There are three known entrances to Hang Én. The cave, which goes through a mountain for 1,645 metres (5,397 ft), has a maximum height around 100 metres (330 ft), and a maximum width of approximately 170 metres (560 ft) is a feeder to Hang Sơn Đoòng, 2 kilometres (1.2 mi) away.
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.