Located in Rongshui, Laojun Cave, also known as Zhenxianyan, is the first of the eight scenic spots in Rongzhou. It is called Shuiyue Cave. Xu Xiake, a great traveler of the Ming Dynasty, lived here for 13 days, and left a travel record of 11,800 words, vividly depicting the mountains and waters of the Laojun Cave and the legendary mythology. Most of the stone cliffs in the cave are works of the Song Dynasty, among which the world The first true immortal rock is the title of Zhang Xiaoxiang, the famous poet of the Song Dynasty. In addition, the hidden fairy caves are equally wonderful. The small scenes of the old man returning from the cave, Laojun preaching, Laojun blessing and so on are more vivid, and the illumination of the colorful lights is like being in a fairyland. It is worth mentioning that the way to discover the hidden fairy cave is very special. There is a small skylight to find the cave below.