1. Kimberley Big Hole - South Africa

2. Glory Hole - Monticello Dam, California


This is the "Glory Hole" at Monticello dam, and it's the largest in the world of this type of spillway, 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 body would shoot out near the bottom of the dam (below). There is one person known to have had this experience. She did not live to tell of it.  

3. 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 ¾ miles deep and 2.5 miles wide.
4. Great Blue Hole , Belize
At surface level the near perfectly circular hole is ¼ mile wide, and the depth in the middle reaches 145 meters. Obviously the hole is a huge hit with divers.

This incremine can be found 300km northeast of Yellowknife in Canada

7. Sinkhole in Guatemaladible ..