The caves arebetween 400m to 4km long and range from 60m to 100m wide. All of themremain intact and have a startling display of beautiful stalactites.
The Phong Nha-Ke Bang National Park is working with thecavers to establish their exact dimensions and condition so they candecide on the best ways of protecting them while at the same timedeveloping the local tourist industry.
Phong Nha-KeBang is a national park in the centre of Quang Binh province innorth-central Vietnam . It protects one of the world’s two largestkarst regions with several hundred caves and grottos.
It was first recognised as a world natural heritage site by UNESCO in 2003.-VNA