Ключевые слова: ancient, architecture, asia, asian, attraction, border, building, built, china, chinese, construction, culture, defense, famous, fortification, fortress, great, great wall, heritage, hill, historic, history, landmark, mountain, mutianyu, old, orient, outdoor, protect, protection, scenic, sightseeing, stone, tourism, tower, travel, unesco, vertical, wall, watchtower, wonder, world,