Keep an eye out at Caesar Creek Flea Market — you're likely to discover some treasure or funny trinket among the stalls here. After you've had a good look at the wares, grab a bite to eat from one of the food vendors.
This community marketplace is located in Wilmington. Once you've explored everything you can at Caesar Creek Flea Market, have a look at nearby Ohio Renaissance Festival Grounds, Caesar Creek State Park, and Caesar Creek State Park Beach.