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Phong Nha - Ke Bang National Park is a national park and UNESCO World Heritage Site in the Bố Trạch and Minh Hóa districts of central Quang Binh Province, in north-central Vietnam, about 500 km south of the nation's capital. The park covers a total area of 857.54 km2 which are divided into three zones, a "strictly protected zone" (648.94 km2), an "ecological recovery zone" (174.49 km2), and an "administrative service zone" (34.11 km2)
In general, there are two groups of landforms in the Phong Nha - Kẻ Bàng area, namely non-karstic and karstic landforms. Non-karstic landforms includes three types: The middle and low dome-block mountains developed in intrusive magmatic massifs; The middle denudation-structural mountain belts developed in terrigenous rocks of Cretaceous age; and The low block-denudational mountain belts developed in other terrigenous rocks.
Karstic landforms in this area are of typical tropical karst which are divided into two groups of forms: The karstic forms on the surface including cone and tower karst, karrens, valleys and dolines, border polje, etc; The underground karst consisting of caves.
Phong Nha - Ke Bang also contains two dozens of mountain peaks with over 1,000 metres height. Noteworthy peaks are the Peak Co Rilata with ta height of 1,128 m and the Peak Co Preu with a height of 1,213 m.
Mounts in karstic area of the park rise at typical height of above 800 m constitute a continous range along Laotian-Vietnamese borderline, of which notable summits above 1000 m are: Phu Tạo (1174m), Co Unet (1150m), Phu Canh (1095m), Phu Mun (1078m), Phu Tu En (1078m), Phu On Chinh (1068m), Phu Dung (1064m)….. Inserting into these summits are 800-1000 m high summits of Phu Sinh (965m), Phu Co Tri (949m), Phu On Boi (933m), Phu Tu (956m)……
Phong Nha-Ke Bang covers 300 different grottoes and caves. Phong Nha cave is assesed by BCRA as the top cave in the world due to its 4 top records: the longest underground river, the highest and longest cave, broadest and most beautiful fine sand beaches inside the caves, the most spectacular stalagmites and stalactites. According to the assessment of UNESCO, The karst formation of Phong Nha-Ke Bang National Park has evolved since the Palaeozoic (some 400 million years ago) and so is the oldest major karst area in Asia and Phong Nha displays an impressive amount of evidence of earth’s history. It is a site of very great importance for increasing our understanding of the geologic, geomorphic and geo-chronological history of the region.
Besides the grotto and cave systems, Phong Nha has the longest underground river. The Son and Chay are the main rivers in this national park. There are over ten spectacular streams, springs and waterfalls in Phong Nha-Ke Bang area, namely: Gió waterfall, Madame Loan waterfall, Mọc stream erupting from a limestone mount range, and Tra Ang stream.
Reference
Phong Nha Ke Bang, Available at: http://www.phongnhawonder.com/overview.html . Accessed: April 25 2010.
2009, Để Phong Nha -Kẻ Bàng mãi là di sản thiên Nhiên, Đà- Hằng- Hùng [ Mooc stream]. Available at: http://vovnews.vn/Home/De-Phong-Nha-Ke-Bang-mai-la-di-san-thien-nhien/20095/112688.vov. Accesses: April 25 2010.
Ảnh Phong cảnh [Phong Nha]. Available at: http://www.vapa.org.vn/vie/modules.php?name=Forums
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