Ключевые слова: ancient, architecture, beautiful, blue, boat, bridge, building, center, city, cityscape, culture, day, douro, down, downtown, embankment, europe, hill, historic, historical, history, horizontal, house, houses, landmark, old, oporto, panorama, panoramic, port, porto, portugal, portuguese, red, ribeira, river, sky, sunset, tourism, town, traditional, tram, travel, urban, view, water, white, wine, yellow,