I was going to suggest Ithaca, the town where Cornell University is located, which is in the Finger Lakes region. Not exactly a landmark, maybe, but pleasant to visit, with a really pretty gorge right through town and a historic mechanical carillon in the university tower, which would be fun if you happened to hit on a tour. Lots of hills, though, so you need a lot of stamina and comfy shoes.
The very northeastern corner of Pennsylvania is also pretty -- stay away from Scranton/Wilkes-Barre unless you like industrial decay, but the smaller towns and country roads around the very corner of the state are pretty. But maybe even more so across the NY border, toward the Catskills, I just haven't been there.
You might want to get a guidebook or two; even though rental cars now probably all have GPS, the motels and gas stations and so on may be sort of sparsely marked, with only those chains that paid the car company to advertise. Mobil travel guides used to be pretty good, or the AAA (American Automobile Association) publishes regional guidebooks with lists and ratings for lodging, dining, and sightseeing. (They might even be free to you if you're a member of the German driving association, I forget its initials; you could just walk into the AAA office in Cleveland and ask.) B&B's, though, you would need a separate book for, or a search online.
Has anyone seen Selkie around lately? IIRC, some of this area used to be her family's stomping ground; she might even still be there now.