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HANG SON DOONG - THE CAVE THAT BUILT A VILLAGE

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The remarkable story of the discovery in central Vietnam of what has been called the biggest cave passage in the world and how it's discovery has transformed a war torn area from extreme poverty to one of the biggest tourist areas in Vietnam.

The remarkable story of the discovery in central Vietnam of what has been called the biggest cave passage in the world and how it's discovery has transformed a war torn area from extreme poverty to one of the biggest tourist areas in Vietnam.

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