Ключевые слова: aerial, architecture, boat, bridge, building, buildings, city, cityscape, colorful, day, district, douro, downtown, embankment, europe, european, famous, gaia, historic, historical, history, house, houses, landmark, landscape, medieval, nova, old, old town, oporto, panorama, panoramic, porto, portugal, portuguese, promenade, red, ribeira, river, scenic, sky, skyline, street, summer, tourism, town, travel, view, water, wine,