|First appearance||"The Deep South"|
- "Hail Atlanta!"
Atlanta was a city on the planet Earth that was once landlocked. However, in an effort to boost tourism and become an even bigger Delta hub, it was moved offshore. The city then subsequently overdeveloped causing itself to sink to the ocean bottom and its inhabitants evolved into mer-people more quickly than usual since the caffeine from the Coca-Cola bottling plant helped speed things up.
- The Lost City of Atlanta is based on the fabled Lost City of Atlantis, and Atlanta, Georgia, the state's capital.