Ключевые слова: architecture, blue, blue hour, bridge, cards, city, cityscape, douro, douro river, downtown, dusk, europe, evening, famous, gaia, harbor, henrique, historic, illuminated, infant, landmark, landscape, light, night, night lights, old city, old town, panoramic, port, portugal, portuguese, reflection, river, road, scenery, side, sides, sightseeing, sky, tourism, town, townscape, traffic, travel, twilight, urban, view,