Cheju, Korea's largest island, is the country's only island province.
It consists of nine inhabited islands, including Udo, SangCh'ujado, Piyangdo, Kap'ado, and Marado, and forty uninhabited islands.
Among Cheju's many nicknames is Island of the Three Abundances,
because of its many stones and many women, and its ever present sea wind.
Cheju has many natural wonders and a unique culture that draws tourists from around the world.
The total land mass of Cheju Province is 1,825 sq. km.
The oval-shaped main island accounts for 1,810.24 sq. km.
It measures 73 km from east to west and 41 km across.
Geologically the island is composed of volcanic matter such as basalt and trachyte, mixed with sedimentary rock and some clay.