Atlantis

Echoes of the tale of Atlantis - an Utopian Atlantic island which, according to Greek mythology, sank beneath the ocean after an earthquake - can be found in the legend of Lyonesse, the land of Tristan, which supposedly sank beneath the sea between Cornwall and the Isles of Scilly. Only in modern times have occultists and novelists attempted to connect the legend of Atlantis directly to the Arthurian saga.

Some have argued that Plato was recounting a genuine legend, while a different body of opinion has contended that the story is a moral fable. According to G. Knight some occultists maintain that Merlin originally came from Atlantis. The same is said of Igraine.