Nanshiyang Grand Canyon Attraction is located at the border of Beijing Xishan, on the Yongding River, at the foot of the Great Wall, in the northern part of Mentougou District, and within the boundary of Yanchi Town. The total length of the canyon is more than 20 kilometers, and the total area of the Attraction is about 40 square kilometers. The Attraction is divided into "one gorge, nine valleys, 18 bays, and 72 nodes", from bottom to top, they are Fanchen Valley, Changchun Valley, Wuyou Valley, Yanxiang Valley, Bailin Valley, Xiaoyao Valley, Qingyuan Valley, Qixia Valley, and Chenxi Valley. It is a tourist attraction for landscape photography, popular science research, biological collection, red education, and mountain hiking. [Geology and geomorphology] Nanshiyang Grand Canyon belongs to the lateral branch of the Yanhecheng fault. Hundreds of millions of years ago, a large amount of dolomite and limestone were deposited in the ocean. During the "Yanshan Movement" and "Himalayan Movement", the crust rose, the water retreated and the stones floated. After the alternation of cold and warm in nature, wind and rain erosion, the magic craftsmanship was carved, leaving behind geological wonders such as the line of sky, the root of the ladder, the Black Dragon Pool, the cover is not strict, the stone hanging coffin, Luo Datian, the single gate building, and the water ripples. The canyon is winding and secluded, and the peaks are steep and beautiful. There are also famous peaks in the west of Beijing, such as Bijia Mountain, Qipan Mountain, Tianci Mountain, Tianzuo Mountain, Tianyou Mountain, Yunu Peak, and Huoyan Mountain in the scenic area. Among them, Tianzuo Mountain, Tianyou Mountain, and Tianci Mountain are about 1400-1500 meters above sea level, and Yunu Peak is 1580 meters above sea level. Canyons, strange peaks, and cliffs constitute a rich geological landscape that is majestic, strange, dangerous, and secluded. [Ecological Environment] Although Nanshiyang Grand Canyon is a mountain and sea rocky place, it also has many animals and plants, and there are also many exotic flowers and plants. For example, there are wild kiwis over 100 years old, perennial asparagus, arisaema, aconitum, nepheline trees, wild lilac, scutellaria, polygala, saposhnikovia, adenophora, stone flowers and other economic plants. There are also coniferous or coniferous and broad-leaved mixed forests on the gentle slopes; wild animals such as mountain rabbits and grass snakes. [Historical Relics] Nanshiyang and Beishiyanggou were historically known as Nanxiyanggou and Beixiyanggou. There are rich historical and cultural heritages in the Nanshiyang Grand Canyon Attraction. There is the Great Wall: the Great Wall of the Northern Qi Dynasty is located in the west and south of Dacun. The entrance of Nanshiyanggou (Xikouzi) and the entrance of Beishiyanggou are the southern and northern Shiyangkou of the Juyongguan system of the Ming Dynasty's inner Great Wall. Dacun is Changyukou, and there are also Changyuxikou and Fangliangkou. There is a model Great Wall round city on the south mountain of Shuitou Village in the north of the Attraction. There is a dressing table from the Liao Dynasty, and there is also a Fenghuitou not far away. There are ancient roads: in addition to the Xixi Ancient Road, the Forty-Five Ridge Ancient Road from Dacun to Qinyukou, and the Dazhen Ancient Road from Dacun to Zhenbiancheng, Nanshiyanggou itself is an ancient road leading to Huailai, Luzishui, and Xiangyangkou, and Jiuhegou is also an ancient road; Luzishui Niangniang Temple, Sanqing Temple, Sanguan Temple, Xiuzhen Cave at the ancient Great Wall, Desheng Temple in Dacun, Shanshen Temple in Shanshenmiao Village, Dragon King Temple in Fangliang Village, Luzishui Shangfang Temple and Xiangyangkou Dabeiyan Guanyin Temple (not covered tightly) are all full of ancient legends and magical stories. [Red Sites] During the Anti-Japanese War, Ladder Head was the office of the Changwanhuai Joint County Zuogong Office. During the "Pingjin Campaign" of the Liberation War, some deserters of the 104th Army fled along Jiuhegou and were intercepted and captured by the militia of Qingbaikou and other villages. There are also red sites in the valley, such as the Anti-Japanese Site of Jiao Ruoyu, the former mayor of Beijing and the county magistrate of Wanping County. Exploring the secrets of Nanshiyang, the magical Grand Canyon, will give you a variety of experiences.