Ключевые слова: ancient, architecture, asia, beijing, china, china wall, chinese, chinese wall, culture, dynasty, fog, grass, great wall, greatwall, gubeikou, heritage, hill, hills, history, jinshanling, landmark, landscape, mist, mongolia, monument, mountain, mountains, nature, old, outdoor, outdoors, overgrown, pollution, province, ruin, scenery, scenic, sightseeing, simatai, smog, smoke, stone, tourism, tower, travel, wall, watch tower, watchtower,