Ключевые слова: architecture, building, cathedral, church, city, cityscape, culture, europe, european, famous, heritage streetcar, heritage tram, historic, history, house, landmark, landscape, medieval, nature, old, outdoor, porto, porto portugal, porto tram, porto travel, portugal, portuguese, rail, railroad, religion, road, square, street, streetcar, tourism, tourist, tourists, tower, town, train, tram, tram in porto, transport, transportation, travel, tree, urban, vehicle, view, vintage,