The Del Mar Fairgrounds--which hosts the county's annual fair and the Del Mar Thoroughbred Club--unites local communities in an arena that attracts worldwide attention. The stunning beauties who were crowned Fairest of the Fair and the smoldering good looks of Tommy Hernandez as Don Diego symbolized the hospitality of the San Diego County Fair, whose historic roots began humbly in the genteel port town of National City, just 10 miles north of the...