This diamond mine in eastern Siberia (Mirny, to be exact) is so deep that the surrounding "air zone... is closed for helicopters" after "a few accidents when they were 'sucked in' by downward air flow..."
Finally, look for the tiny red arrow in the following photograph; it's pointing to a 220-ton rock-hauling truck more than 20' tall.
Finally, look for the tiny red arrow in the following photograph; it's pointing to a 220-ton rock-hauling truck more than 20' tall.
