A Whole New World Discovered By A Farmer After Seeing A Hole In The Rock

At more than 200 meters tall, it fit a 40-story high-rise inside. What's more, at more than 150 meters wide, it could comfortably hold a 747. Vietnam's Hang Son Doong is the biggest cave in the world, and taking a visit is basically remarkable.

A Guided Trip

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Guided trips take seven days and cost $3,000. This includes five nights of camping in the cave.

Rare Pearls In The Cave

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The cave is also rich in rare pearls, which are created when calcium salts form concentric layers around a grain of sand.

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