Ключевые слова: ancient, architecture, attraction, center, city, city landscape, city skyline, cityscape, destination, douro, downtown, embankment, europe, famous, heritage, hill, historic, historical, history, landmark, landscape, medieval, monument, old, oldtown, oporto, panorama, panoramic, patrimony, picturesque, porto, porto portugal, portugal, portugal landscape, portuguese, ribeira, river, riverbank, roofs, scenic, sightseeing, sky, tourism, tower, town, travel, travel europe, unesco, urban, view,