Groups comparison

Atlantis - 1978 to 2015
Features the mythological island of Atlantis either as location or theme.

Hell - 1981 to 2020
Includes Hell or equivalent location.

Purgatory - 1982 to 2017
Includes purgatory or equivalent location.

Mythical location - 1984 to 2015
Includes one or more mythical or similar location.

El Dorado - 1985 to 2008
The legendary lost city of gold. Considered fictional by modern scholars.

Land of the dead(Underworld;Netherworld) - 1987 to 2015
A place where the souls of the dead go.

Mu, lost continent - 1993 to 2004
Takes place on the lost continent of Mu or uses it as a thematic element.