The Seomjingang River, one of the four major rivers in Korea, starts from Imsil and Sunchang. It merges with several bodies of water in Gokseong, Gurye and Hadong before flowing into the South Sea.
In Gokseong, the Seomjingang River is also known as the Sunjagang River. It flows about 36 kilometers through the region. A number of big and small valleys throughout the length of the river provide fantastic views and relaxation spots all year round. Also, Riverside Festival and Seomjingang Literature Forum are held every summer to offer fun summer activities along the river.