Glory hole - Monticello Dam
If you were to jump in for some reason your slightly damp body would shoot out near the bottom of the dam .

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.
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.
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.
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.
Obviously the hole is a huge hit with divers.
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