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Topic: 3100ft

Murky abyss of 3,100ft deep underground shaft explored

Hold on to your specs while peering down here. You'd have a long climb to the bottom if they fell off.  This rocky chasm in China is one of the world's deepest underground shafts. It stretches down for an astonishing 3,100ft, or 1,026 metres. An international team of cave explorers who ...

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