Columbus, Indiana

How many days should a person set aside when they visit Columbus? I figure a
afternoon after we arrive, and then the next morning, just before we leave.
We would visit in the middle of May. We will be driving from Pittsburgh, and
plan to drive backroads on the way there traveling through Washington
Courthouse (?), and the way back through Marion. We do not plan to hit any
of the larger cities along the way, since we have already visited them. Any
suggestions of places to see along the way, or nice little places to eat
that are unique to the area such as bar-b-que places or good chicken.

Thanks

Tom

PS I plan to post this to the road group also, since that group appears to
know some good routes.