Samseonghyeol, Sacred shrine in Jeju, South Korea.

Samseonghyeol is a walled grove in central Jeju City holding three depressions in the ground, called holes or ponds, where the founding legend places the emergence of the three Eulna demigods. Around them stand a shrine, stele and ritual halls, and the site is Historic Site No. 134, designated on 10 June 1964.

The site dates back over 4,000 years and marks the legendary origin point of the kingdom of Tamna. According to local mythology, three demigods emerged from the ground at this location and established the island's early settlement.

The three depressions are called Samseonghyeol, or Moheunghyeol, and are revered as the birthplace of the Yang, Go and Bu clans. Since 1526, when magistrate Yi Su-dong ordered their descendants to perform rites, the hyeolje ancestral ceremony has been held here. A shrine, stele and ritual hall stand beside the holes.

The site is located near Jeju City Center and is easily accessible by local transportation or rental car. A visit typically takes 1 to 2 hours to explore the museum and view the stone mounds at a comfortable pace.

The three depressions are called Moheunghyeol, meaning "hole of the hairy man," a name tied to the Eulna brothers of the founding legend. The site was designated Historic Site No. 134 on 10 June 1964. A ritual hall, stele and shrine buildings stand beside the holes.