Atlantis is one of the two largest cities in the Lower Elements, the other being Haven. It is never actually described or visited by the characters in the book series, but is mentioned frequently, especially its prison complex - Deeps Maximum Security Prison - where dangerous criminals are detained. It is known that the original Atlantis is mostly buried between a 3-story shuttle dock in the new Atlantis. It is underwater and protected by a giant air bubble, and many, if not all, of the civilians use gills to breathe. More about the city is revealed in The Atlantis Complex.
