Indianapolis Motor Speedway is at 4790 W. 16th St. The proving grounds and racetrack for automobiles and motorsports was built in 1909. The facility's Indianapolis 500-mile race has resulted in such automotive improvements as the rearview mirror, balloon tires and ethyl gasoline. The speedway, also the site of the IndyCar GrandPrix, NASCAR's Brickyard 400 and the Red Bull Air Race, covers more than 600 acres, with an 18-hole PGA golf course inside and around the track.
Also inside the 2.5-mile oval is the Indianapolis Motor Speedway Museum, which displays winning race cars, car and driver memorabilia, antique automobiles and equipment. The Tony Hulman Theatre continuously screens a film about the track's history, and bus tours of the track are offered when it is not in use (weather permitting). A variety of behind-the-scenes tours are available.