Helen, GA in the Moutains
Lots of history in any of the old towns, stop in every old square and read the plaque next to the court house.
If your into hiking check out the Parks.
Another day trip is go over to Washington, GA a beautiful old town. If you can go on a week day and go inside the court house. It has about 20 old photos of the square at different times thru out the history.
Close by, you can visit the Shields-Ethridge Farm it's on the National Historical register and only about 10 mins from Winder. (they are my neighbors). They have lots of old buildings and the Ethridge decendants still live in the home and work the farm. They have their own web site.
http://www.shieldsethridgefarm.org/
There's also Lake Lanier, pretty picnic areas down by the dam.