Vietnam National Park Has The Largest Cave In The world! : Phong Na
The cave was discovered by local residents in 1991. Previous residents frightened by the noises from inside the cave, which turned out to be an underground river.
2. Thien Duong caves
Now, if the Thien Duong Cave in Phong Nha National Park has been named as the longest cave in Asia. British Cave Research Association has been exploring to the end, it extends for 31 km. Imagine, the distance from Jakarta to Bogor.
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