Aerial view of the Indianapolis Motor Speedway, host track of the venerable Indianapolis 500 auto race, held every Memorial Day weekend in Speedway, Indiana, an enclave of the Indiana capital city of Indianapolis. Carl G. Fisher, James A. Allison, Frank Wheeler, and Arthur Newby, founders of the Indianapolis Motor Speedway, planned the suburb of Speedway south of the track. Constructed in 1909, the track is the original speedway, the first racing facility so named. It has a permanent seating capacity estimated at 235,000 with infield seating raising capacity to an approximate 400,000. It is the highest-capacity sports venue in the world (as of 2016). Photo by Carol Highsmith.