Ponce City Market is one of our absolute favorite places in Atlanta. It is absolutely worth the $10 to go up to the roof just to see the view of the Atlanta skyline! There is also mini-golf, arcade games, and a bar/restaurant on the roof.
The Atlanta Beltline is a beautiful greenway that runs on the east side of the city from Piedmont Park to Krog Street Market. There are many breweries and restaurants on the trail in addition to interesting and local street art that makes for great photos.
The Fernbank Science Center is an interactive and hands-on museum and planetarium that is a perfect outing for adults and kids alike!
If you're looking to get out and into nature, Stone Mountain Park is a great option. You can hike up to the top of the mountain and take in the view of the surrounding area. You can even see the Atlanta skyline in the distance. There is also a gondola that takes visitors up and down the mountain if hiking up seems a little too daunting.