Yunxia Cave is located in front of the Tiger Mountain in the Mengshan Tourism Area. It is a natural cave. Because the cave is dedicated to the Yunxia Niangniang, it is known as the name. According to legend, the Yunxia Niangniang is the sister of the old mother of Taishan, Bixia Yuanjun. Bixia Yuanjun patrols the world, and takes a fancy to this cave, so he leaves his sister Yunxia here to stay and build the Taishan Palace. Due to the wide and superior location of the cave, it is a good place to cultivate immortals. Therefore, the Sui and Tang eras were made a Taoist view, and the original heavenly, Lingbao heavenly and moral heavenly worship of the three Puritan masters of Taoism in the position facing the mouth of the cave. It is rare to worship four gods in one hole, and they are all gods and immortals.