Hwanung and the bear woman, Ungnyeo. She became human through prayer, mugwort, staying out of the sunlight for 100 days, and eating a lot of garlic. Their son is Tangun or Dangun, who is semi-divine and known as a lawgiver. The start of his reign, 2333 BC, is year 1 of the Korean calendar.
Jeju-do origin myth. According to the founding myth of Samseong-hyeol, Jeju was uninhabited until three divine men emerged from the ground at Moheung-hyeol, now located on the northern foot of Halla-san. Samseong-hyeol Shrine, This shrine houses three small caves from which, according to Jeju folklore, three god deities emerged and went on to create the three provinces of Jeju island and populate the island. The three young men emerged from the caves and lived a happy life together on the island. A king on the mainland was visited by a messenger who told him to send his three daughter princesses on a boat to the island with livestock and seeds. The three daughters taught the men on the island how to farm. They were married and spent their honeymoon nights within the caves. Afterwards, each of the three men shot an arrow into the air. Wherever their arrow landed, they were to make their homes. Thus, the three provinces and kingdoms of Jeju island were created. The shrine also houses a rock that bears the marking of an arrowhead where one of the arrows was said to have landed. On a special holiday on Jeju, the direct descendants of these three couples, which includes the majority of Jeju's population gather together at this Shrine and pay tribute to the ancestors.
Sangbang-ulsa Grotto - I bet this has something good... This is where monk Hye-Il (964-1053) had lived during the Goryeo Dynasty (918-1392)
Jungmun Daepo Coast Jusangjeolli Cliff - hexagonal basalt columns, must be a good story here
Yongduam Rock. (Dragon's head). There are two ancient legends to explain the mystery rock formation. According to one, a dragon envoy of the Dragon King was sent to Mt. Halla to retrieve a herb which would give Eternal Youth. But the Mountain God cast the dragon envoy into the sea and turned him to stone. The second legend tells of a dragon who stole the jade bead amulet of the Mountain God. While trying to escape, the Mountain God shot down the dragon with a golden arrow and it fell into the sea, turned to stone. The two-million year old basalt rock formation resembles a partially sumberged dragon, with it's head above water.
Jeju's Mystery Ghost Roads. Exactly, the same phenomenom as Magnetic Hill in New Brunswick. It's an optical illusion created by the surrounding landscape at the base of Mt. Halla that gives you the impression that a hill is going up when it's actually going down.