Wright Patterson Air Force base outside of Dayton, Ohio will probably take all day< but if you have the time check into Carillon Historical Park in Dayton. Lot of interesting exhibits and Dayton was once home to the National Cash Register company and John Kettering who invented the automobile self starer as well as the Wright Brothers. I wouldn't venture into downtown Dayton though, it's become a slum. If you spend the night there are plenty of fine accommodations close to the airport.

Carillon Historical Park - Dayton History