Ever wonder where the diamonds in your engagement ring came from? There is a chance they came from this ginormous open pit diamond mine (the world’s largest) near Mirny, Russia, East Siberia:
According to the U.S. Mine Rescue Association, the mine is 525 meters deep and a whopping 1200 meters in diameter. The air space over the mine is closed to helicopters due to a few accidents in which choppers were sucked into the pit by downward air flow!
And notice that tiny red arrow in the photo above. That arrow is pointing to a full size, 2o-foot-tall BELAZ 220-pound payload truck! Wild, no?