Apparently the largest ever hand dug excavation in the world, 1097 meters in the mine produces more than 3 tons of diamonds before closing in 1914
A glory hole is used when a dam is at full capacity and water must be drained from the reservoir. This is the 'Glory Hole' at Monticello dam, and was the largest in the world of valve type, its size makes it possible to consume 14 400 cubic meters of water per second
This is reputedly the largest man-made excavation on earth. Extraction began in 1863 and still continues today, more and more holes in size constantly. In the current conditions in the hole wide and 2.5 miles
4. Great Blue Hole, Belize
This incredible geographical phenomenon known as a blue hole is situated 60 miles from the mainland of Belize. There are many blue holes around the world,
but nothing spectacular like this one
5. Mirny Diamond Mine, Siberia
Pretty sure most people have seen this one. This is an absolute beast and holds the title of largest open diamond mine in the world. At 525 meters, with diameter of 1200 meters, there is even forbidden to fly zone above the hole due to a few helicopters that have been interested.
6. Diavik Mine, Canada
Mine is so big and so far the area that he has the airport with a runway large enough to accommodate Boeing 737. It looks as cool as the water around freezing.
7. Sinkhole in Guatemala
This photo is a chasm that occurred early this year in Guatemala. Hole swallows a dozen homes and killing at least three people.