Ключевые слова: aerial, architecture, attraction, boat, boats, bridge, building, cathedral, city, cityscape, cruise, destination, district, district of porto, dom luis, dom luis i bridge, douro, douro river, downtown, embankment, episcopal palace, europe, european, harbor, high angle, high angle view, historic, if, if from the port, landmark, pier, port, porto cathedral, portugal, portuguese, promenade, river, river boats, river pier, riverside, riverside wharf, skyline, stream, tourism, travel, view, waterfront, waterfront stream, wharf,