Ohyeondan is a memorial site in Jeju honoring five Confucian scholars who were either exiled to Jeju or came as defense commanders. It enshrines Chungan Kim Jeong, Gyuam Song In-su, Cheongeum Kim Sang-heon, Donggye Jeong On, and Uam Song Si-yeol, with a rite held every year. Designated as a Jeju Special Self-Governing Province Monument on August 26, 1971, the site retains five small stone monuments and a basalt rock inscribed with Chinese characters. The grounds are small enough to walk through in about 15 minutes.