![Son Doong Cave](https://pix.avax.news/avaxnews/34/fe/0000fe34_medium.jpeg)
Son doong cave is a cave in Phong Nha-Kẻ Bàng National Park, Bố Trạch district, Quảng Bình Province, Vietnam. Currently the biggest known cave in the world, the cave is located near the Laos-Vietnam border. Inside is a large, fast-flowing underground river.
In early August 2013, the first tourist group explored the cave on a guided tour at a cost of US$3,000 each. The group had six members from Australia, Norway, Russia and USA and spent 7 days and 6 nights for the tour. Next exploration trips will be arranged.
![Son Doong Cave](https://pix.avax.news/avaxnews/39/fe/0000fe39_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/35/fe/0000fe35_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/36/fe/0000fe36_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/37/fe/0000fe37_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/38/fe/0000fe38_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3e/fe/0000fe3e_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3a/fe/0000fe3a_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3c/fe/0000fe3c_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3b/fe/0000fe3b_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3d/fe/0000fe3d_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/43/fe/0000fe43_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/3f/fe/0000fe3f_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/42/fe/0000fe42_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/40/fe/0000fe40_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/44/fe/0000fe44_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/41/fe/0000fe41_medium.jpeg)
![Son Doong Cave](https://pix.avax.news/avaxnews/45/fe/0000fe45_medium.jpeg)
Wikipedia
22 Sep 2013 12:30:00,
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