|Location:||Phong Nha - Ke Bang tourist complex, Quang Binh province. Binh Lu Commune, Phong Tho District. Near Hue, 50km northwest of Dong Hoi. 500km south of the capital, Hanoi.|
|Dimension:||A=135m asl., L=980m.|
|Address:||Phong Nha-Ke Bang National Park, Son Trach, Bo Trach, Quang Binh, Viet Nam, Tel: +84-5236-77021, Fax: +84-5236-77021. E-mail:|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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|09-AUG-1986||Phong Nha Nature Reserve declared.|
|1991||Phong Nha Nature Reserve extended to 41,132 ha, approved management plan.|
|19-MAY-2000||Phong Nha - Ke Bang National Park (PNKBNP) established.|
|2003||inscribed into the UNESCO World Heritage List.|
Tien Son Cave is located in the Ke Bang Mountain, beneath other caves. Nearby, only 400m away, is the famous Phong Nha Cave. It seems the two caves are different stages of cave development. As Tien Son is much higher, it is the older, fossil level. It is a dry cave, as the level of the karst groundwater is below at the level of Phong Nha. This cave is developed for 400m, with paths and electric light.