Socheonji is a large tidal pool on Jeju Olle Trail Course 6 along the Seogwipo coast, where seawater and waves flow in and out. On clear, windless days, Hallasan is reflected in the pooled water. From the entrance of Socheonji, the Olle Trail runs 20 minutes round trip to Gudumi Port, and a pavilion leads down to the shore. The stone path below is dangerous for people who have difficulty walking.