The World Bog Snorkelling Championships is as crazy as it sounds. Competitors (many in fancy dress) must snorkel their way through a 60ft long muddy bog to see who sets the quickest time. The festival takes place in Wales every year and can attract competitors from as far afield as Japan, Australia and Canada.
Boryeong Mud Festival - South Korea
Boryeong in South Korea is home to the annual Mud Festival. The festival first started in 1998 and now attracts up to 1 million visitors each year. The mud from the Boryeong region is believed to be rich in minerals and good for the skin, giving people the perfect excuse to get absolutely covered in the stuff!