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Inside The World's 3rd Largest Cave

The world’s third largest cave has “rooms” that stand 330 feet high and span 600 feet across. It’s so spectacular that it’s playing home to several upcoming blockbusters, including this summer’s Pan, and others the force compels us not to disclose. We hiked through the Vietnamese jungle to explore it. » 4/21/15 1:55pm 4/21/15 1:55pm