Introduction to the Three Surnames Cave: There are three cave entrances, which are said to be the places where the three gods Go Euna, Yang (Liang) Eina, and Fu Eina, the ancestors of Tamna Kingdom, appeared in the past (most residents of Jeju Island still have these three surnames today) ), revered as a holy place. Surrounded by lush forests, there are the Sanxing Hall with the cave altar as the center, the incense altar, the ceremony hall and the former academy - Chongbao Hall. The three hollows of Sanxing Point will not accumulate water even if it rains heavily. In addition, there are 300-year-old pine trees, chaolu trees and cherry blossom trees surrounding Sanxing Cave. These trees all grow in the direction of the cave, giving the appearance of bowing their heads in worship.