This Saturrrday, September 26, all Georgia State Parks are free admission! Visit them and support them amid funding cuts and keep them from having to be closed!
Visit www.savemystateparks.org for more info.
If you live in Atlanta, magnificent Sweetwater Creek park is to the west (assuming it's open considering this creek flooded last weekend). Red Top and Etowah Indian Mounds are to the northwest, by Lake Allatoona and Cartersville. Panola Mountain is to the southeast between Lithonia and Stockbridge.
(see below for photos and more about these)
I plan to be at Cloudland Canyon and its wild waterfall this weekend - it's on Lookout Mtn. near Chattanooga.