TALK ABOUT ONE OF THE WORLD HERITAGE SITES YOU KNOW IN Viet nam

I'll talk about Phong Nha- Ke Bang National Park, one of the eight world heritage sites in Viet Nam. It is located in central of Quang Binh Province, about 500 km south of Ha Noi. Thanks to its complex geological structure with different kinds of stone, Phong Nha - Bang can be compared to a huge geological museum. Phong Nha- Ke Bang mountain can provide a lot of valuable information about the Earth's geological developing through various periods. One geological characteristic to notice here is the system underground rivers, grottos and caves in the limestone mountains. The park is in an area with a high average rainfall; however, few rivers and streams can be seen here because the water is absorbed inside the limestone mountains. As a result, tens of millions of years, water has been eroding the rocks, creating numerous grottos and caves. Phong Nha- Ke Bang is famous for its caves such as Phong Nha, Tien Son and Thien Duong, Son Doong caves. Because of its geological value, Phong Nha- Ke Bang was recognised as a World Heritage Site by UNESCO in 2003. I strongly recommend that you find time to visit Phong Nha- Ke Bang Park. It'd be worthwhile exploring its caves and grottos and seeing the diversity of its flora and fauna. If you enjoy mountain climbing, there are some steep mountains over 1, 000 metres high, which can be a real challenge for adventurous climbers.