Nidan
Vidan Island is an island located in Shindo County, North Pyeongan Province, North Korea, and is the westernmost land in Korea. In June, 1958, the Shindo District was constructed as a bridge between Shindo, Maandong, Maldou, Changde, Yangshu, and Tangshan, and the trench of the English River. The area is 64.368㎢ and the circumference is 47.07km.