My favorite thing to do in Atlanta is go to a Braves baseball game, but seeing as its the offseason, you cant do that right now. Six Flags, Stone Mountain, White Water (seasonal), CNN center, Olympic Park, walking around downtown and looking at the buildings I really enjoy this (in good parts of the city). I also like to go to the Stonecrest Mall
First off if you want to see something fun and interesting go to the Coca Cola Factory and you need to go the Silk Restraunt if you like to have a fancy night and like sushi.Besides those go to the CNN Center and Centinal Olympic ParkThey always have some festival.
http://www.georgiatouristguide.com/http://www.exploregeorgia.org/