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lqwertyd OP t1_j8jcswb wrote

Reply to comment by Carl_The_Sagan in TIL The Bingham Canyon Mine in Utah is almost 4000 feet deep (that's 3X as tall as the Empire State Building). It's the largest man-made excavation and the deepest open-pit mine in the world. It's also visible to the naked eye from space. by lqwertyd

Agreed. I flew over it the other day. I had no idea what it was, but took a photo I was so impressed by the scale. Stumbled upon the answer last night watching a documentary on the Pebble copper mine they are trying to build in Alaska.

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