World's Biggest Cave

Ratings: 6.34/10 from 44 users.

World's Biggest CaveThere's a jungle inside Vietnam's mammoth cavern. A skyscraper could fit too.

Hear author Mark Jenkins and National Geographic's Boyd Matson talk about what could be considered the largest cave in the world, the 2.5-mile Hang Son Doong, or mountain river cave, along the Vietnam-Laos border.

Is it the World's Biggest Cave? More than three times the height of Niagara Falls, much of Vietnam's Mountain River Cave has remained untouched by humans until now.

With exclusive footage, NGC reveals, for the first time in history, astounding evidence that this could be the largest cave in the world.

Together with renowned expedition leader Howard Limbert, cave geologist Darryl Granger uncovers the formula for how the cave grew so grand.

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24 Comments / User Reviews

  1. Guest

    Great doc.

    And I thought Carlsbad Caverns was big?

  2. toddy


  3. Schneider

    Boring! Can't see hardly any of the cave just a load of people dithering around in the dark.

  4. Brian Keys

    From someone who has only crawled through abandoned mines, this is awe inspiring.

  5. Tony

    great doc. Thanks

  6. Karenwasherefirst

    I am surprised that there wasn't more life in the cave.

  7. magarac

    Nice hole!

  8. ukphil

    Good Documentary. But you all are not the first people to have entered the cave before.

  9. Rayvan Osano


  10. Gary V

    Great doc, huuuuuuge cave

  11. Daniel Gogarty

    great cave but i have seen hit wodlice b4 so its nt realy a new species is it

  12. Shannon Elizabeth Staley

    OK. Not one of the best Natgeos I have seen, though...needed more umph.

  13. ThomasOwens

    I love it how NG always tries so hard to prove their "global warming" argument in all the new programs they produce. These new programs are half propaganda, half reality, since the Rockefeller foundation started funding them. Just tell us the facts NG, not your theories.

  14. unrepentant_expat

    You can't handle the facts.

  15. Bill Blankenship

    I'm looking for a documentary about some explorers who become stuck in a cave after it starts to rain so they have to find another way out.
    It was early 90s when I saw it. Any ideas on where to look? anyone please??


    Some sound counter-arguments about their research there! Oh wait, just another anti-intellectual bashing science with no evidence..

  17. il ms1234

    Great Discovery,
    Congratulation, your team have done a great job
    So far so good, you HOLD the record
    Hope that none 'll break yours .. soon ;)
    Thanks for all endeavors of your team to bring this magnificent cave to us.

  18. Roger l

    Incredible....simply incredible...thanks for this doc

  19. the555hit

    Beam me down there --- got this idea for a theme park with burgers 'n rafting 'n facebook 'n everything

  20. Raptor jones

    Yeah, not really a documentary is it? More like some European guy showing off his holiday snaps and appealing for funds. Wish I could get paid to go on vacation in Vietnam.

  21. Agnieszka Jeglinska


  22. SH

    @Bill Blankenship -- i think you are referring to a movie called Sanctum. It's not a doc, but it's based on a true story. good movie!

  23. A. O'Moose

    Excellent documentary! Eye opening!

  24. elizann

    So amazing! Thank you for this doc.

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