Last Monday of May in a small English locality near Gloucester, a cheese rolling competition is held where a cheese is thrown down a hill and participants chase after it trying to catch it. The last Monday of August in Llanwrtyd Wells, Wales hosts a skin diving championship in a 55-meter long marsh where participants must navigate it using only fins and snorkels. Every July 4th in the small Finnish locality of Sonkajärvi, they celebrate the World Wife Carrying Championship where men carry women weighing over 17 kilograms in various styles across a wet and muddy obstacle course.