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