The central Region Hosts the State capitol Columbus. There is much to see and do in this area.
The Shawnee and Adena have both left their marks on this region.
Well Known sites with good Websites.
These are sites I have enjoyed visiting; Theuy have very good websites of their own and by clicking on the images in the Left Hand collumn you will be directed there.
The Ohio Historical Center is in Columbus and is a fun museum to visit its collection is very ecclectic. The only real theme here is Ohio History. The flint collection is really good. While you are here check out the Ohio Village next door. If you are in luck The Muffins will be playing vintage baseball its great to watch.
Here is a collection of links to the counties visitors bureu's
http://www.travelohio.com/central_ohio.html
http://www.visitmarionohio.com/
http://www.morrowcounty.net/04/cityguide/attractions.shtml
http://www.escapetolickingcounty.com/
http://www.unioncountycvb.com/
http://www.columbus.world-guides.com/
Here is a link to an article I wrote about how to find destination while travelling. I wrote for my travelling friends who are always asking how I found this site or that one, it outlines the basic tools I use.
http://www.bukisa.com/articles/273316_how-to-find-interesting-destinations-when-travelling