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4. Bingham Canyon Mine-Utah 美國猶他州賓漢姆峽谷銅礦坑
The Bingham Canyon Mine is a copper mine in the Oquirrh mountains, Utah. The mine is 0.75 mile (1.2 km) deep, 2.5 miles (4 km) wide. It is the world's largest manmade excavation.
賓漢姆峽谷銅礦位于猶他州奧克爾(Oquirrh)山脈，這處礦坑深1200米，寬4000米。這是當前世界上最大的人為挖掘礦坑。
