Ключевые слова: ancient, architecture, attraction, background, balkans, belgrade, bright, building, capital, castle, city, culture, europe, famous, fortress, heritage, historic, historical, history, kalemegdan, landmark, landscape, lookout tower, medieval, monument, old, outdoors, ruin, serbia, sightseeing, sky, stone, summer, symbol, tourism, tourist, tower, town, travel, turkish, urban, wall, watchtower,