lqwertyd OP t1_j8jcswb wrote on February 14, 2023 at 7:05 PM

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.