This is the glory hole belonging to monticello dam in california and its the largest in the world, its size enabling it to consume 14 ??400 cubic feet of water every second.
The hole can be seen at the top left of the photo above.
If you were to jump in for some reason your slightly damp body would shoot out near the bottom of the dam .
Kimberley big hole – South Africa
Apparently the largest ever hand-dug excavation in the world, this 1097 metre deep mine yielded over 3 tonnes of diamonds before being closed in 1914. The amount of earth removed by workers is estimated to total 22.5 million tonnes.
Bingham canyon mine – Utah
This is supposedly the largest man-made excavation on earth. Extraction began in 1863 and still continues today, the pit increasing in size constantly. In its current state the hole is 3/4 mile deep and 2.5 miles wide.
Great blue hole – Belize
Situated 60 miles off the mainland of belize is this incredible ??geographical phenomenon ?? known as a blue hole. There are numerous blue holes around the world but none as stunning as this one.
At surface level the near perfectly circular hole is 1/4 mile wide, the depth in the middle reaching 145 metres. Obviously the hole is a huge hit with divers.
This is probably the largest sinkhole in the world, it was cracked open in February 2007 in northeast of Guatemala city. It is over 300 ft. deep and it had already killed 3 people also caused thousands to evacuate the city.
This hole is known as Chuquicamata which was an open pit copper mine. It is not the largest copper pit in the world, but it did produces the most copper. This hole is in Chile and it is 850 meters or 2788 feet deep.
This is Mirny Diamnd mine, in Siberia, Russia. It was the largest diamond pipe in the USSR. This pit is now abandoned, back then when it was operatimg, it would takes about 2 hours for trucks to reach the bottom of the pit because it is 1722 feet deep.