1 / 4   The annual Boryeong Mud Festival was celebrated at Daecheon Beach on Saturday in Boryeong, South Korea. /CFP

2 / 4   Locals believe the mud from Boryeong has positive effects on the skin due to its mineral content. /CFP

3 / 4   The mud is brought from mud flats near Boryeong to the beach by truck. /CFP

4 / 4   Revelers roll around in the mud during the Boryeong Mud Festival. /CFP