The event known as the "Jewel in the Crown" of horse racing is the Derby. Specifically, this term often refers to the Epsom Derby in the UK, which is one of the most prestigious flat races in the world. Held annually, it garners international attention and features the best three-year-old thoroughbreds competing for glory. Winning the Derby is a significant achievement for trainers, owners, and jockeys, as it symbolizes excellence in horse racing and can elevate a horse's reputation and market value.