Ключевые слова: ancient architecture, ancient walls, architecture, architecture photography, avila, castile and len, castle walls, city fortifications, cityscape, cultural heritage, culture, european cities, european heritage, exploration, fortified city, heritage sites, historical architecture, historical landmarks, historical site, history, landscape, medieval architecture, monuments, panoramic view, scenic view, sightseeing, sightseeing tours, spain, spanish cities, stone structures, tourism, tourism photography, travel adventures, travel attractions, travel destination, travel photography, unesco, unesco sites, unesco world heritage, urban exploration, walls of avila,