Kennecott Copper Mine

Kennecott Copper Mine, the world's largest man-made excavation and first open-pit, is located 28 miles southwest of Salt Lake City. 2 ½-miles across, and ¾-mile deep, the mine is so big, it can be seen from space shuttles in outer space. Zoom out to see the whole mine! http://www.youtube.com/watch?v=P9Df0_-OxDc