10 Lubang paling spektakuler buatan manusia


1. Darvaza Gas Crater-Turkmenistan


2. Kimberley Diamond Mine-South Africa


3. Monticello Dam-California


4. Bingham Canyon Mine-Utah


5. Great Blue Hole-Belize


6. Mirny Diamond Mine-Siberia


7. Diavik Mine-Canada


8. Sinkhole-Guatemala


9. Udachnaya Pipe-Russia


10. Chuquicamata-Chile





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