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archaeologySouth AfricaChileislandsaurora borealisAfghanistanpolarCulgoa RiverremoteNaga hillsAsiahigh altitudeRepublic of the CongoQatarartSouth-America

      caves at Kerásovo, Greece

    • Ασπροχάλικο
      wikipedia
      Louro river valley
      Asprochaliko cave, Preveza, Greece
      Eric Higgs cut in Asprochaliko cave, Preveza, Greece