A Brief History of the Indianapolis 500

A Mecca of Racing
The Indianapolis 500 routinely draws more than 300,000 fans, making it one of the largest single-day events in all of sports. The massive grandstands can seat about a quarter-million, and throngs more crowd into the 224-acre infield. Pictured above, Sam Hornish Jr. speeds into turn three during the 2006 race.

• Photos: Formula 1
• Photos: The Kentucky Derby