Sinkhole in Guatemala
Kimberley Big Hole – South Africa
Glory Hole – Monticello Dam, California
A glory hole is used when a dam is at full capacity and water needs to be drained from the reservoir. 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.
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 miles deep and 2..5 miles wide.
Great Blue Hole, Belize
Mirny Diamond Mine, Serbia
This one is an absolute beast and holds the title of largest open diamond mine in the world. At 525 meters deep, with a top diameter of 1200 meters, there’s even a no-fly zone above the hole due to a few helicopters having been sucked in.