Centennial Olympic Park is a must visit place in downtown Atlanta.
Honoring the 1996 Olympics that were held in Atlanta, this expansive park offers a quiet oasis in the middle of bustling Downtown Atlanta, though the park can become a beehive of activity, as many special events and concerts are held here. For a fun, free way to entertain the kids, let them play in the fountains.
http://www.centennialpark.com/