Ключевые слова: architecture, backgrounds, balkans, beauty, beauty in nature, belgrade serbia, blue, bright, building, city, cityscape, color image, danube river, danube valley, day, environment, europe, front view, hill, horizontal, idyllic, industry, landmark, landscape, light, light natural phenomenon, looking, looking at view, majestic, marina, nature, nautical vessel, no people, old, outdoors, river, scenics nature, serbia, sky, street, sun, sunny, tourism, tower, travel, urban, vacations, view, water,