Ключевые слова: architecture, beautiful, blue, blue sky, buildings, city, cityscape, day, douro, europe, gaia, holiday, houses, landmark, landscape, nature, old, oporto, outdoor, port wine, porto, portugal, rio douro, river, scenic, sky, summer, sun, tourism, tourist, town, traditional, travel, urban, vacation, view, vila nova de guia, water, waterways,