Yorkshire’s 4-mile Kiplingcotes Derby has been held every year since 1519, making it the oldest annual horse race in England. According to the ancient rules, if the race ever fails to take place, it must never be run again, so organizers make sure to arrange at least a nominal showing even in bad conditions. In 1947, 2001, and 2018 (harsh winter, foot-and-mouth crisis, heavy rain) the full race was not run but a single horse was led around the course to keep the tradition alive.

Another oddity: Under the rules the winner gets 50 pounds but the second-place finisher gets the remainder of the entry fees — so he may come out ahead.