Many areas have some minor hills, or some variant infinitely more interesting (hoosier myself, I regret moving here 10 years ago and may finally be bothered enough by it to deal with moving out in Spring). All in all, a state this big with less than 1,000 ft between the highest and lowest parts is just disappointingly flat, given the general lack of other natural attraction.

I'd say the caves in that region of the state are interesting, but options like Mammoth Cave are not that far away in KY (and they have better hills too).