Ключевые слова: architecture, blue, building, bulgaria, bulgarian, business, capital, city, cityscape, cloud, color, destination, downtown, europe, facade, front, graphic, green, horizontal, house, illustration, landmark, landscape, metropolis, modern, old, outdoors, palace, panorama, road, sky, skyline, skyscraper, sofia, street, structure, tall, taxi, tourism, tower, travel, tree, urban, view, white,