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The World's Biggest Cave San Doong AKA "Mountain River Cave" - Vietnam - YouTube

Environment  (tags: Hang Son Doong, caves, guinness records )

- 1597 days ago -
National Geographic presents The World's Biggest Cave, a TV special that gives us a close-up look at Son Doong, a huge recently-discovered underground labyrinth in Vietnam. 655 ft. (200m) high 490 ft. (150m) wide and at least 4 miles (6.5 km) long.


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Past Member (0)
Wednesday January 7, 2015, 11:20 am
I find caves simply fascinating.
Thank you Slava

Past Member (0)
Wednesday January 7, 2015, 11:22 am
Thanks Slava--will check it out tonight!
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