Atlantis
Atlantis was a mythical Earth island located in the Atlantic Ocean. This island sank after being stricken by an earthquake. 

Upon discovering the Native American colony on the planet Amerind in 2268, James T. Kirk compared it to discovering Atlantis or Shangri-La. ()

In 2364, William T. Riker in comparing the myths of Atlantis, Neinman, and the planet Aldea, described them as "self-contained, peaceful, with incredible technical sophistication which provided for every citizen's daily needs, allowing them to devote themselves to culture and art, which was beautiful beyond compare and valued beyond price." ()

By the latter half of the 24th century, Earth scientists had devised a project dubbed "the New Atlantis Project" as a way of creating a new continent in the Atlantic Ocean, much like Atlantis once did. ()

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Mythological locations
Earth geography