Ключевые слова: 18st, alcantara, ancient, antique, aqua, aqueduct, arc, arch, architecture, bridge, building, century, city, cityscape, column, construction, downtown, engineering, europe, freedom, gothic, highway, historic, historical, history, industrial, landmark, lisboa, lisbon, monument, old, outdoor, portugal, portuguese, reservoir, roman, scenic, stone, street, structure, tall, tourism, touristic, town, transportation, travel, tree, valley, water,