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
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