belgrade fortress and the kalemegdan park. serbia.

architectural architecture attraction balkans banister belgrad belgrade big building capital center central centre citadel city cityscape complex cultural danube day downtown embankment europe european fall famous fort fortification fortress grad historic historical house jugoslavia junction kalemegdan kalemegdanski landmark landscape largest masonry monument outdoor outdoors panorama panoramic park path paths picturesque railing railings river riverwalk sava scenic serbia serbian sights sightseeing sky skyline spring stair stairs stari stone strength sun trees urban view walking wall walls winter yugoslavia