The Indianapolis Motor Speedway is the most famous race track in the world and the home of the Indy 500, run every Memorial Day weekend since 1911. The 2.5-mile oval is also a NASCAR venue (the Brickyard 400) and a Formula 1 host in years past. With a capacity of around 250,000 — over 400,000 for the 500 itself — it is the largest sports venue on the planet.
Outside race days, the IMS Museum on the infield holds dozens of historic Indy 500 winning cars and a separate gallery of motorcycles and engines. Track tours by bus include a stop in Victory Circle and (if conditions allow) a lap of the oval. Buy timed tickets online — busy in summer.