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Mud festival in South Korea
19 July 2014
Last updated at 11:48 BST
Every year, the Boryeong mud festival takes place with people playing in wrestling pits and on mud slides.
When people get covered in mud at festivals here in the UK, it usually isn't by choice but in South Korea its a tradition at one festival.
Every year, the Boryeong mud festival takes place with around 3 million people getting involved, according to the organisers.
People arrive at the festival in clean clothes and leave filthy.
There's even wrestling pits to help them get muddy.
And mud slides too!
The mud, which is transported by truck to the festival, is believed to be good for the skin because of its mineral content.