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More than three times the height of Niagara Falls, much of Vietnam's Mountain River Cave has remained untouched by humans. With exclusive footage, National Geographic 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. And international zoologist Anette Becher identifies unique underground species that evolved there. Finally, the team climbs to the cave's ceiling. Will their readings help confirm that they have just ascended to the top of the World's Biggest Cave?
Movie Details
- Format
- DVD
- Encoding
- Region 1 (US & Canada)
- Runtime
- 0 hours, 45 minutes
- Label
- National Geographic
Manufactured on Demand
This film was released by studios as part of their MOD (Manufactured-On-Demand) line of releases. This is not a bootleg. In order to make the release of films with low sales demand possible, major studios like Universal, Sony, Warner, Paramount, Hallmark and 20th Century Fox have contracted with a distributor to provide manufactured-on-demand releases to consumers.