Atlantis is one of the many Lost Cities. Similar to human legends, Atlantis is located underwater in a dome of force fields made by Psionpaths. Elves get into Atlantis by making a whirlpool and jumping through it. When they get past the force fields there is a large sponge that the Elves land on. This sponge cushions their fall and dries them off. To get out of Atlantis, Elves must ride inside large bubbles to the surface air and light leap when the bubbles pop. One of the main transportation methods in Atlantis is Eurypterid - this is something like a taxi system.
Linh Song became "The Girl of Many Floods" after her parents, Quan and Mai, brought her and her twin brother Tam to Atlantis, which is underwater, and Linh accidentally flooded the city. This caused her to be exiled to Exillium.