This marathon began as a way to settle a pub argument in 1979 when Welsh locals Gordon Green and Glyn Hones wondered who would win a marathon: a horse or man.
Ever since then an annual 22 mile |(35.4 km) marathon is held in Welsh Town, Wales with both men and horses running.
Men have won on two occasions, but usually the horses are seen winning.
If a human wins, they are eligible to win a $40,000 cash prize.
8. Redneck games
Held in East Dublin, Georgia every summer since 1996 this athletic event involves unique sports you might not usually see in any other sporting context.
Some of the events include toilet seat tossing, seed spitting, mud belly flops, armpit serenades and dumpster diving.