Ключевые слова: aerial, aerial landscape, aerial view, ancient, architecture, blue sky, building, city, cityscape, colorful, downtown, europe, european, green, heritage, historic, historical, house, landmark, landscape, narrow, old, oporto, orange, orange tiles, panorama, plants, porto, porto district, porto portugal, portugal, portugal flag, portuguese, red, river, roof, roofing, rooftops, stone, street, tiled roof, tiles, tourism, town, traditional, travel, unesco, urban, view, wall,