Hangyeryeong, Misiryeong and Jinburyeong are the three ridges that represent Mt. Seoraksan, and Hangyeryeong long with the Misiryeong. It was called Sodongraryeong as the connecting path between the east coast and the inland. In December 1971, a large paved road was made to connect Yangyang and Inje, which became the tourist road between inner Mt. Seoraksan and outer Mt. Seoraksan. If you go down Hangyeryeong path you will reach Osaek District. Everything in this district are said to be related to a factor of five as “O” in Osaek means “five” in Korean. They even say the carbonated water spring from the base rock here has 5 flavors. The 3-story pagoda (National Treasure No.497) that stands in Seongguksa Temple is called Osaek Stone pagoda because the rock is said to shine in 5 colors.The Osaek flower myth says that the village name 'Osaek' was given because there was a tree that bloomed flowers of 5 different colors.