Ключевые слова: aerial, architectural, architecture, beautiful, boat, bridge, bright, buildings, church, city, cityscape, colorful, day, dom, douro, downtown, europe, european, famous, historic, historical, house, landmark, luis, metro, old, oporto, outdoors, panoramic, port, porto, portugal, portuguese, rails, ribeira, river, skyline, tourism, tourist, town, traditional, tramway, transport, travel, unesco, urban, view, water, world, yellow,