|Location:||Phong Nha - Ke Bang tourist complex, Quang Binh province. Binh Lu Commune, Phong Tho District. Near Hue, 50 km northwest of Dong Hoi. 500 km south of the capital, Hanoi.|
|Light:||Incandescent Electric Light System|
|Dimension:||A=135 m asl., L=980 m.|
|Guided tours:||L=400 m.|
|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 on the UNESCO World Heritage List.|
Tien Son Cave is located in the Ke Bang Mountain, beneath other caves. Nearby, only 400 m 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 400 m, with paths and electric light.