Top 10 amazing holes in the Earth

Please read article, cited after the quote. Articles open in a new window.

4 Bingham Canyon Mine-Utah

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.(Source: CRIENGLISH.com/china.org.cn)

http://news.xinhuanet.com/english/2009-03/05/content_10951495_3.htm

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