Son Doong Cave is in the heart of the Phong Nha Ke Bang National Park in Quang Binh province, central Vietnam. This giant cave was only explored in 2009/2010 by the British Cave Research Association. Situated in the deep jungle, the entrance to the cave was found by a local man Mr Ho Khanh.

The grotto is about 200m wide, 150m high, 6.5km long at least. Its length could be much more but due to the shortage of technology condition, the explorer of BCA could not go through the length of the grotto to measure how long it is. With its dimension, Son Doong grotto has overtaken the first rank of Deer grotto in Gunung Mulu national park of Malaysia for being the biggest natural grotto in the world.

Son Doong cave tours have been operated since August 2013. The best time to do Son Doong cave expedition is February – August. From September to January is flooding season in the area thus there is no tour to be organized.

Inside Son Doong cave there are two huge daylight windows which allows the light to enter many parts of the cave. At the base of these windows are large jungles which use the available light and so trees up to 30m tall are present. But Son Doong is not only about its immense size, the cave has amazing examples of some of the best speleothems in the world. Giant stalagmites up to 80m high and enormous rimstone pools are present throughout the cave.

There are also excellent examples of giant cave pearls and a newly discovered side passage is full of large fossils over 300 million years old. As well as rare species of plants in the cave a number of new species of animals have recently been discovered. Monkeys, hornbills and flying foxes have all been seen in the jungle section of the caves.

Read more

• Dong Van Old Quarter Ha Giang
• Phong Nha National Park
• Tien Son Cave
• Ke Go Lake
• Cao Phong Hoa Binh

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