Ключевые слова: ancient, architecture, asia, asian, authentic, badaling, beijing, border, boundary, brick, china, chinese, construction, culture, defense, dynasty, famous, fort, great, greatwall, heritage, hiking, hill, historic, history, jinshanling, landmark, ming, mountain, mutianyu, nature, old, oriental, outdoor, protect, protection, qin, simatai, stone, structure, tourism, tourist, travel, trek, trekking, walk, wall, wonder, world,