Ключевые слова: aerial, ancient, architecture, building, castle, city, cityscape, cultural, culture, europe, fortification, fortress, green, heritage, hill, historic, history, house, landmark, landscape, lisbon, medieval, monument, moorish, mountain, national, old, palace, portugal, portuguese, rock, romantic, sintra, site, stone, summer, tourism, tower, town, travel, unesco, view, white, window, world,