The Cooper's Hill Cheese Roll is an annual event held on Cooper's Hill near Gloucester, England. The event involves a thrilling and unique race where participants chase a large wheel of cheese down a steep hill. Competitors run or tumble after the 9-pound cheese, with the first person to cross the finish line at the bottom of the hill winning the cheese. The race is known for its dangerous nature, with steep inclines and high speeds. It draws large crowds of spectators and has become a beloved, albeit unconventional, tradition in the UK.

The Bog Snorkelling World Championship is an annual event held in Llanwrtyd Wells, Wales. The unique and quirky competition involves participants racing through a 60-yard trench of water-filled bog, using only a snorkel and flippers, with no swimming allowed. Contestants must navigate the muddy, mucky course as quickly as possible, making for a fun and often humorous spectacle. The event has gained international attention and attracts competitors from around the world. Along with the championship, the festival features music, food, and other activities, celebrating the fun and eccentric spirit of this unusual Welsh tradition.