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Able to fit a Boeing 747 and a block of skyscrapers, the largest cave in the world hides in Vietnam. Here's what you need to ...
VOV.VN - The breathtaking Son Doong Cave, located in Phong Nha - Ke Bang National Park, central Vietnam, will serve as a key ...
Vietnam is home to the world's largest cave. It's so vast that it has its own weather system and could fit an entire city block of skyscrapers inside. Now, only one tour operator allows travelers ...