Beyond the snark I've already participated in, 10 days in Indy is easy to manage if you view Indy as a base. As probably discussed in prior "how-to" threads, northeast Indiana and southeast Michigan are an auto museum lover's dream location, from the Henry Ford to the Auburn-Cord-Duesenberg Museum to any number of smaller places dedicated to automotive or racing history. Plus you can spend a day or two exploring the theatre, museums, and/or art in Chicago. It could be a very memorable trip.
https://automotivemu...motive-museums/
https://automotivemu...motive-museums/
IF one wants to visit the region without the 500 race, the region within a 500 mile circular from Indy, is absolutely loaded with the gearhead -trains, planes & automobile - museums and events depending on when one takes in the area.
Down at Madison, Ind. is an Unlimited Hydroplane the day after the 4th of July, which is in a historic town and beautiful area.
I went there, and visited the Indy Museum (for he second time) plus a LOT of gear-head museums on the way from and back to Minnesota.
IF you like Fourth of July fireworks, travel at night across mid-Illinois 4th of July evening.
You will be able to watch multiple fireworks shows miles away as mid-Illinois is VERY flat, it was an interesting drive.