Photo 30 Jan mookerjee: The Big Hole. The Mir Mine, in Mirny, Eastern Siberia, Russia, is an open-pit diamond mine. At 1,722 feet deep and 3,900 feet wide, it’s the world’s second largest excavated hole. The airspace above the mine is closed to helicopters because a powerful downward air flow can suck them into it.

mookerjee:

The Big Hole. The Mir Mine, in Mirny, Eastern Siberia, Russia, is an open-pit diamond mine. At 1,722 feet deep and 3,900 feet wide, it’s the world’s second largest excavated hole. The airspace above the mine is closed to helicopters because a powerful downward air flow can suck them into it.

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