VietNamNet Bridge - Explorers from Britain have discovered 39 more caves with a total length of 17km in the Phong Nha - Ke Bang National Park in the central province of Quang Binh.

The caves were found during a survey by explorers of the British Royal Cave Association and the Hanoi College of Natural Sciences starting on March 16. The discovery raises the total number of caves in Phong Nha-Ke Bang to about 300.

Of the new caves, there are three significant ones, May (Cloud), 1100 m long; Vuc Moi (New Abyss), with a depth of 213m; and Lan (Orchid), 1.230m long. Another notable cave is A Ky, which is 1,260 meters long and harbors a stream with the hydrologic system sourced from Laos.

The new cave system is very diverse, with dry caves formed in the high terrain and geologic sinkholes (doline caves) similar to the Son Doong cave.

This was the 16th survey in the past 24 years. The total length of the discovered caves of the part now stands at about 200 km.

Phong Nha - Ke Bang is considered the most important grotto system in the world.

Some pictures of the new caves:

The skull of ancient Vietnamese found in a cave.

A big centipede species in a new cave.

Na Son