Atlantis is a sunken city to the North-East of Skull Atoll and East of the Modron Cube. It's located at the bottom of a deep trench.

Of particular interest to the Wizard's Guild is the fact that one of the Five Lores of the the Language Primeval is located in the sunken city.

The city itself is an ancient ruin of approximately the same age as Mathghamhna, on Arcanus.

The city is inhabited by magic-using Fish Folk.