St. John's Fortress guarding the old town, UNESCO World Heritage Site, Dubrovnik, Croatia, Europe

photography horizontal color image travel travel destinations outdoors day no people croatia europe old town unesco world heritage site dubrovnik st john's fortress fortress coastline water's edge sea water building architecture cloud sky croatian flag flag pole travel destination tourist destination tourist destinations seas ocean oceans outdoor outside old towns nobody no one no person fort forts fortresses past history historic archaeological archaeology ruin ruins old ruin old ruins daytime buildings