kimberley big hole - south africa:
mirny diamond mine - siberia:
bingham canyon mine - utah:
glory hole - monticello dam:
Diavik mine - Canada:
sinkhole - Guatemala:
great blue hole - belize :
mirny diamond mine - siberia:
bingham canyon mine - utah:
glory hole - monticello dam:
Diavik mine - Canada:
sinkhole - Guatemala:
great blue hole - belize :
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