Check out Fred's Meat & Bread for great burgers and fries. - http://www.fredsmeatandbread.com/
Explore the food hall and market or head up to the rooftop to enjoy views of the city at Skyline Park.
If you watch Atlanta on FX you'll recognize this spot. And since you're in Atlanta you have to try the lemon pepper wings wet.
Located in heart of Midtown Atlanta, and less than 2 miles from the Georgian Terrace, Piedmont Park is the perfect destination to enjoy some green space in the city.
Walk the Beltline between Ponce City Market and Krog Street Market