South Korea most of which is not arable. Lowlands, located primarily in the west and southeast, make up only 30% of the total land area. About three thousand islands, mostly small and uninhabited, lie off the western and southern coasts of South Korea. Jeju-do is about off the southern coast of South Korea. It is the country's largest island, with an area of . Jeju is also the site of South Korea's highest point: Hallasan, an extinct volcano, reaches above sea level. The easternmost islands of South Korea include Ulleungdo and Liancourt Rocks (Dokdo/Takeshima), while Marado and Socotra Rock are the southernmost
Hallasan the mountain became Sanbangsan (산방산). Wonsan became the name of Hallasan because the center of the mountain is the highest point and the mountain looks like a circular cone. On a very clear day, Hanllasan is visible from the mainland. Yeongjusan was believed to be a habitat for a plant species that made people immortal. According to a legend, immortal wizards of Korea used to live in Hallasan. They were immortal because of this special plant. Qinshi Huang wanted the plant to live forever and ordered his men to get the plant (200 AD). Buak became the name of Hallasan,