Ключевые слова: aerial, ancient, architecture, birdview, boat, bridge, city, cityscape, coast, coastline, construction, day, daytime, dom, domluis, douro, down, downtown, drone, europe, european, historic, historical, iron, landmark, luis, metal, metallic, old, oporto, overall, panorama, porto, portugal, portuguese, ribeira, river, roof, rooftops, scene, se, ship, skyline, steel, sunny, top, tourism, town, train, travel, unesco, view, water,