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Built in 1909, this is one of the most celebrated auto raceways in the world. Each May, more than 400,000 spectators throng to the 2.5-mile oval course to watch the Indianapolis 500, the largest single-day sporting event in the world, boasting the largest purse in motor racing.

The Indianapolis Motor Speedway Hall of Fame Museum (open daily 9am-5pm; $3 adults, $1 children 6-15) is within the track's oval. The speedway also features Brickyard Crossing, an acclaimed golf course with 4 of its 18 holes inside the track.