Ключевые слова: architecture, bay, blue sky, bridge, building, city, cityscape, day, design, double deck, douro, estuary, europe, european, evening, famous, gustave eiffel, high, historic, historical, iron, landmark, luis, luiz, metal, metallic, old, outdoor, outdoors, port, porto, porto portugal, portugal, portuguese, ribeira, river, street, sun, sunset, toilet, tourism, town, transportation, travel, traveling, tree, urban, vacation, view, vila nova de gaia,