Take a look at the biggest open diamond mine in the world. It is not
from the next "Star Wars" film, it is real!!! Mirny, Russia, East
Siberia. 525 m deep, 1200 meters in diameter. The air zone within
this mine is closed for helicopters - happened after a few
accidents when they were "sucked in" by downward air flow...
This giant truck BELAZ (200-220 ton payload ) looks like small spot
on next picture...
And finally look from a satellite: