Kennecott Copper Mine

This is 28 miles southwest of Salt Lake City. It is the world's largest man-made excavation at 2 3/4-miles across and 3/4-mile deep. It is so big it can be seen from outer space.

If you stretched out all the roads in the open pit mine, you'd have 500 miles of roadway. At 1,215 feet tall, the Kennecott smokestack is the highest structure in Utah. By 2015 the mine will be at least 500 feet deeper than it is now.

This was Favorite Boy, Joe's Saturday adventure.