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