I used to go to Louden NH every year before IRL.
Some year I'll get it together enough to drive up to Montreal for the F-1 GT.
The midwest has its own fender-free format....USAC et al.
I also would like to go to the 24 Hours at Daytona (even if they do have fenders)
Been to one NASCAR race at Dover, Delaware, the Monster Mile they called it, it was cool, but not the excitement of Indy cars.....
One year at Indy I had a press pass and could literally stand at tracks edge, those cars going by so fast just sucked the wind out of you, it was AWESOME........