Ключевые слова: architecture, blue, building, city, cityscape, clerigos, clouds, colorful, cranes, densely populated, destination, downtown, europe, european, famous, historic, historical, history, interesting, landmark, location, metropolitan, old houses, oporto, panorama, panoramic, porto, portugal, portuguese, rooftops, scenery, scenic, sky, skyline, symbol, tiles, tower, town, townified, traditional, travel, urban, urban planning, view, viewpoint,