Atlantis is the name, first given by Plato, for a sunken island-continent in the Atlantic Ocean. Similar lost or hidden island paradises exist in most cultures' mythologies. DJ Tyrer's interest in Atlantis led to the naming of Atlantean Publishing and also a poetry booklet of his, The Atlantean. It has been discussed a few times in The Supplement.
The legend of Atlantis also inspired David Leverton to create the Atlantean 'A' logo.
Possibly located in Southend-on-Sea, if The Day of the Davidians is to be believed...
See also Atlantean Society.