Sanxing Cave is a very small temple. There is a myth that three ancestors of different surnames married three princesses of Bilangguo and multiplied their descendants on Jeju Island. It is also the birthplace of the myth of Jeju Island. There are many stones but forgot to take pictures. Visitors are very small and quiet, and soon came out. Near Sanxing Cave is the Jizhou Museum of Folk Customs and Natural History, but when we see too many tour groups and buses, we are not interested in visiting it in a moment.