OP, to reiterate one final time, DO NOT GO TO NEW JERSEY, what the fuck is in New Jersey? You'll step on a fucking syringe laying around and catch AIDS, everyone here knows that. Gary, fucking Indiana? Don't go to Indiana for anything because that's fucking stupid. Almost ALL of America is "rural", so there's no sense in wasting it on ONE SPOT that isn't even representative of rural America as a whole. If you've got four fucking months here, you definitely have time to hike various trails for several weeks, as I, and others have said, the Pacific Trail, the Appalachian Trail (I can vouch for this one, I live along it, and go explore the mountains on a near-daily basis. It's a lot of fun, but get some Bear Pepper Spray, cuz there's a fuckton of bears. One-two months spent hiking both trails, you'll be golden. Spend the remaining time driving around, visiting cities, monuments, and generally exploring the vast nothingness and nigger infestation that is America. You won't need more than a couple days in any given place.
I'd run out of shit to do in America in two months, and that's if I spent 1 1/2 months climbing mountains.
Driving through the middle part of Kansas was unique for me, it's literally flat for like 500+ miles, trippy as fuck. Loads of windmills, literally thousands and thousand of them forever off in the distance. At night, it's creepy as fuck cuz they all blink red light at exactly the same time. Looks like some alien shit.
May as well drive through the Rocky Mountains, if you get the chance. Pretty fucking cool, plus you can stop and buy some weed on the way through, if you're into the kind of thing.
Hang out in a few college towns. You'll get loads of pussy thrown at you for having an accent, and backpacks and shit. Dumbass college girls will eat that shit up so quick. I'm not even kidding you, you might drown in pussy before you get halfway into your trip.
Hike trails, drive, visit landmarks and monuments, drown in pussy. Thats it