View of Zemun rooftops and the Danube River, Zemun, Belgrade, Serbia, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside background people incidental people people in the background day travel travel destination travel destinations city cities rooftops danube river zemun belgrade serbia europe european building exterior building buildings architecture architectural urban scene urban scenes urban high angle view high angle elevated view history historical historic heritage tradition traditional cityscape townscape view over river water diminishing perspective vanishing point perspective