Ключевые слова: 1, architecture, beach, brown, center, city, cityscape, commute, culture, douro, downtown, electric, electrical, europe, historic, historical, landmark, number, old, oldfashioned, oporto, passeio alegre, porto, portugal, portuguese, public, rails, retro, river, river bank, street, streetcar, town, traditional, train, tram, tramcar, tramway, transport, transportation, travel, trolley, typical, unesco, urban, vehicle, vertical, view, world heritage site, world locations,