The idea for Praiseland came from the Christian theme park Heritage USA that was built in Fort Mill, South Carolina in the 1970s.
Bible Gum is an actual product, which was unknown to the show's writers at the time. The show was later sued by the owners of the company that produced the real product, due to infringement.
Carl is heard to remark "Any religion that embraces carob is not for Carl Carlson." Carob is a natural, "healthier" alternative to chocolate.
Ned in Ned Flanders is short for Nedward, revealed by Kent Brockman in a news cast.
Rachel originally appeared in Season 11, Episode 14, 'Alone Again, Natura-diddily,' the episode in which Ned's wife died.