Do you know which of the four major karst caves in China are: Guilin Ludiyan, Fujian Yuhua Cave, Hangzhou Yaolin Cave, and the stone cave I want to introduce. Shihua Cave, known as Beijing Shihua Cave National Geological Park, is located in Cheying Village, Hebei Zhennan, Fangshan District, Beijing, 55 kilometers away from Beijing. The cave has seven layers with a height difference of 150 meters. At present, all the first and second layers and three or four layers of the cave have been opened to the outside world. Many years ago, the mountains in Beijing were dissolved into many karst caves by carbonate. Shihua Cave is one of them. The geological age of its development is in the limestone of Ordovician Majiagou Formation. With the multiple uplift and relative stability of crustal movement, it developed into multi-layer and multi-branch karst caves. Because the cave is dark, so put on this kind of color lights, creating a gorgeous effect. The original name of Shihua Cave is Qianzhen Cave. There is a legend about Shihua Cave - "Long ago, a monk named Yuanguang came to Nancheying Village and decided to have a rest when he saw the beautiful scenery here. But a cool air in the hot summer made him wake up. He subconsciously looked down the wind and saw the gust of cool wind coming from the cracks in the rocks on the north side of the mountain ditch. His curiosity drove him to make a bright day. White, then the hammer and chisel dried up in the concave table tennis. Finally, he cut a hole with thick bucket mouth. He climbed far and far through the thin-walled hole. He saw the more and more fluorescence gathered in front of him. By fluorescence, he saw that the huge cave in front of him was decorated with many wonderful and colorful scenes, such as bright pillars, flowers, umbrellas and balls. Enraptured, there are the poem title of "Xianxiang Dongfudi, Dreaming into Zhenzang" and the three big words of "Qianzhendong" at the mouth of the cave. Since then, he has been able to make this strange cave his home and devote himself to practice. Now, 700 years later, three strong letters in regular scripts "Shihua Cave" beside the title of the contemporary celebrity Mr. Zhao Puchu still shine in the sunshine. (From the network) Because of the special geological reasons, the temperature here is perennially constant in more than a dozen degrees, which is a good summer place - much cooler than air conditioning. Of course, if you are afraid of cold, it is recommended not to wear shorts, wear a thick coat, in order to avoid colds. Tips - "Adult ticket price 70 yuan, student card, elderly card half ticket, 1.2 meters or less children free of tickets. Transportation route 1, Fangshan (Yancun) exit of Beijing-Shijiazhuang Expressway - Yanhe Road (via Tuoli) - Shihua Cave 2, Liangxiang Airport exit of Fangshan, Jingshi Expressway - Liangtuo Road (via Qinglong Lake) - Shihua Cave