China's giant sinkholes are a tourist hit - but ancient forests inside are at risk

These caves were unexplored for thousands of years, protected by swirling mists and terrifying tales.

Nov 26, 2024 - 09:55
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China's giant sinkholes are a tourist hit - but ancient forests inside are at risk
These caves were unexplored for thousands of years, protected by swirling mists and terrifying tales.
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