Ключевые слова: arch, architecture, billboard, blue, boat, bridge, building, city, cityscape, day, dom luis i, downtown, embankment, europe, european, famous, gaia, golden, hill, historic, historical, history, iron, landmark, lus, metal, old, oporto, outside, port, porto, portugal, portuguese, river, sky, skyline, steel, sun, tourism, touristic, town, travel, urban, view, vila nova de gaia, water, wine,