If you are an avgeek in atlanta, then the Delta museum is a definite must. You can tour the "delta through the ages" exhibit, that tells the story of delta's past, starting with the little crop - dusting company. It has many historic aircraft, including the Delta's first plane flying for Delta Air Lines. DC-3 NC28341 has been fully restored, and is resting in the museum hangar. In the exhibit for more modern times, there is the amazingly cool "Spirit of Delta" B767 that is basically a flying museum of delta's history, inside the museum of delta's history. It is very cool, and I highly recommend visiting.