Not GA but...
Here are a few I've found in NC, for when you run out of ones to visit at home.
Pisgah Covered Bridge
Bunker Hill Bridge
As far as I know, these are the only 2 historical covered bridges left in NC.
"Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts" -Mark Twain