Held in the seaside resort city of Boryeong, visitors can take part in activities such as mud slides, mud wrestling, and mud massages.

Tourists play in the mud during the 13th Boryeong Mud Festival at the Daecheon swimming beach in Boryeong, 190 kilometers southwest of Seoul on July 18, 2010. The annual festival encourages the use of mud for its benifits for skin-care and to promote tourism in the region. The festival runs from July 17-25. AFP PHOTO / KIM JAE-HWAN