2 ~Bingham Canyon Mine near Salt Lake City, Utah, USA.
3 ~ Mirny Diamond Mine , Serbia.
4 ~ Glory Hole - Monticello Dam, California.
5 ~ Sinkhole in Guatemala.
6 ~ Kimberley Big Hole - South Africa.
7 ~ Great Blue Hole, Belize City in the Northern Hemisphere, within Central America.
Pretty cool, huh?
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