Where: Boryeong, South Korea
When: July; annually
A South Korea cosmetics company developed a line of beauty products which featured mud from the Boryeong mud flats as a main ingredient. Since the company couldn't be bothered to spend money on commercials, the Boryeong Mud Festival was born so potential customers could feel the benefits of the special mud firsthand. In case you attend and get bored of the mud slides, mud prison, mud pools, and mud skiing, you can enjoy live music, acupuncture, and the festival's culminating fireworks display.