Cheju island (Chejudo) known as a place of fantasy or mystery is the largest island in Korea and is located in the southwest sea of the Korean peninsula and is highlighted for its uniqueness. The size of Cheju is 73km from east to west, 41Km from north to south in the shape of an oval. The island has an area of 1,845km2 with a circuit road of 182km along the seashores. It has a convenient traffic situation thanks to the several transversal roads and many other small and large roads and its population is about 530,000.