Ключевые слова: architecture, bridge, building, center, city, cityscape, coast, coastline, culture, day, destination, douro, douro river, downtown, europe, european, famous, historic, historical, landmark, old, old town, oporto, picturesque, place, port, porto, portugal, portuguese, rio douro, river, river bank, river mouth, riverside, site, tourism, town, travel, unesco, urban, vertical, view, wave, world heritage site, world locations,