Ключевые слова: architecture, blue, building, city, city walls, cityscape, coast, defensive structure, destination, douro, douro river, europe, european, fernandina, fernandina walls, fortification, fortified walls, funicular, heritage, historic, historical, house, houses, landmark, landscape, medieval, muralha, muralha fernandina, old, oporto, port, porto, portugal, portuguese, river, sea, shore, sky, steep, summer, tourism, town, traditional, travel, urban, vacation, view, wall, walls of d fernando, water,