UNESCO has recognized Phong Nha – Ke Bang national park as a world natural heritage site. The park is also recognized for its biodiversity, with the highest number of animals and plants on planet.

After adventures and discoveries since 1990 of Vietnamese and foreign scientists, the Phong Nha – Ke Bang grotto system in the Phong Nha – Ke Bang national park is recognized as the most beautiful water-grotto system in the world.

Since then, many new caves have been discovered in Phong Nha – Ke Bang and in 2003 the national park was honored as a world natural heritage site; in 2007 Vietnam proposed UNESCO’s second recognition of Phong Nha – Ke Bang as world natural heritage.

 
Phong Nha cave is called the “best cave” but according to scientists, Thien Duong (Heaven) cave, which was discovered in 2005, is more beautiful than Phong Nha.

So far, over 300 caves have been founded in Phong Nha – Ke Bang, which were created by underground rivers running from limestone mountains.

The national park is also recognized for its biodiversity. Moreover, the park is the home to A Rem ethnic minority people, who were thought to be extinct with only 18 individuals left in 1956. This ethnic group is being recovered in Phong Nha – Ke Bang. 

(Source http://www.phongnhawonder.com)