Phong Nha - Ke Bang National Park - The World Natural Heritage Site

The complex of Phong Nha - Ke is situated in western Bo Trach district, near by the international border with Laos. The national park is located in one of the largest areas of contiguous limestone karst in Indochina, which also includes Hin Namno National Protected Area in Laos. It also is a part of the area of the oldest limestone mountains in Asia, which were taken about 400 million years ago. In addition, it contains special values of the formation and development of the earth. 94% of the area of the entire forest is covered by primitive forest, so its biodiversity is richest among forests in Vietnam. The forest boasts 568 floras and 876 faunas, many of which are listed in Vietnam's Red Book. For this great value, UNESCO has recognized Phong Nha - Ke Bang National Park as the World Natural Heritage Site in 2003

Phong Nha Groto

The beautiful grotto of Phong Nha has a depth of 13000m with 14 large caves which are from 10 to 40m high. At the entrances are stalactites that look like huge tooth. Deep inside the caves are stalactites and stanlagmites in various unusual shapes.

A group of English geologists, together with Vietnamese geologists, investigated Phong Nhat Grotto and a number of other caves. The group boated deep inside the grotto and discovered that this is the longest underground river in Vietnam. It is attractive to geologists, hydro geologists and explorers.

An investigation of Vietnamese and foreign geologists shows that Phong Nha has "seven best" in Vietnam: deepest cave, highest and widest entrance, the most beautiful sand and rock banks, the most magnificent and fanciful stalactites and stalagmites, the longest underground river, the widest and the most beautiful dry cave.

Tien Son Grotto

400m from the entrance of Phong Nha Grotto and 130m above sea level is Tien Son Grotto. It is also known as Dry Grotto or Upper Phong Nha. Climbing to steps, visitors reach the entrance of Tien Son Grotto. Deep 1000m inside the mountain, the grotto is look like a stone castle. Its vault is high and well-ventilated, and has white veins that seem to be gilded with silver and gold. Particularly, visitors to the grotto can enjoy acoustic resonance from slabs of stones and stone columns. When you knock at stones, they produce unusual sounds that seem to resound from the earth's womb. Tien Son Grotto is 980m long. Approximately 400m from the entrance is a 10m deep abyss, and that is also the distance visitors and allowed to go in.

According to the studies of explorers from the British Royal Geographic Association, Tien Son Grotto was formed millions of years ago. It is even older than Phong Nha Grotto.

Phong Nha and Tien Son create a beautiful picture in the complex of caves and grottoes in Phong Nha - Ke Bang Natural Heritage Site

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