Sinkhole

depression or hole in the ground caused by some form of collapse

Puebla sinkhole Bayou Corne sinkhole Kleines Heiliges Meer 2010 Guatemala City sinkhole Seeburger See Rudower See 2007 Guatemala City sinkhole Petersham Hole Devils Well Lilla Cave Sager Meer Cedar Sink The Grotto cenote cenote Danube Sinkhole Arendsee blue hole polje

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