Kennecott Copper Mine
In 1887, Enos Andrew Wall purchased claims to the land southwest of Salt Lake City and began underground mining for copper deposits. Later, it was decided that open pit mining would be the best way to continue this project. The mine has produced 18.1 million tons of copper, more than any other mine in history. Now, it has become the largest man-made excavation in the world. It is over two and a half miles across and almost a mile deep. If you stretched out all the roads that line the inside of the mine, it would be 500 miles of road, enough to drive the distance from Salt Lake City to Denver. The copper mine is so huge it can be seen by astronauts in the space shuttle as they circle the earth.