Atlantis is the Twelve-A equivalent of the Americas. It is inhabited by the Native Americans.
The name Atlantis is derived from the language where the nane means "Island of Atlas". Atlas was the Titan who held up the sky in Greek mythology.
- In other films and books, Atlantis was a continent which sank beneath the sea which is described by the Greek philosopher Plato.
- Atlantis is never visited in the books, only mentioned since some of the books only take place in Twelve-A's version of England and Europe. The only time in the series it is mentioned is the part where Michael Saunders screams at Janet Chant for getting the name wrong.