Ключевые слова: architecture, background, beautiful, blue, boat, city, cityscape, dawn, day, destination, douro, europe, european, famous, hill, historic, holiday, house, landmark, landscape, national, nature, old, oporto, outdoor, porto, portugal, portuguese, promenade, red, ribeira, river, roof, ship, sky, skyline, summer, tourism, town, traditional, travel, trip, vacation, vintage, water, yellow,