Ключевые слова: architecture, bridge, building, city, cityscape, colourful, construction, dom, doors, douro, europe, european, exterior, gaia, granite, heritage, historic, historical, house, houses, luis, narrow, nova, old, oporto, outdoor, porto, portugal, portuguese, river, rooftops, ruines, ship, tiles, tourizm, tower, town, travel, typical, urban, view, vila, windows, yellow,