LOUISVILLE is home to the world's most famous horse races, the Kentucky Derby. Since it began in 1875, three year old horses have raced the famed track at Churchhill Downs on the first Saturday in May while spectators sip mint juleps. The nearby Kentucky Derby Museum chronicles the history of horse racing and offers track tours. The J.B. Speed Art Museum has a large collection of Renaissance sculptures and paintings. Near the riverfront plaza, several paddlewheelers conduct tours along the Ohio River and the surrounding historic district's old warehouses have been converted into galleries, shops and trendy cafes.