ancient tower of porto corallo, sardinia, italy

fortification monastery sardinia building landmark waterway ancient corallo tourism terrain europe castle estate tower porto italy ruins cliff wall rock ancient architecture beautiful blue brick building cagliari castle coral corallo europe flumendosa fort fortification fortress green harbor harbour hill hilltop historic historical history italian italy landmark landscape medieval nature old porto ruin sardegna sardinia sky south staircase stairs stone sud summer torre tourism tourist tower travel villaputzu wall watch watchtower