Land of Ooo

The Land of Ooo is the main setting of Adventure Time, and is the home of Finn and Jake, along with all of their friends and foes. It is divided into different kingdoms, of which the most prominent are the Ice Kingdom, Candy Kingdom, Fire Kingdom, and Cloud Kingdom. There are also many geographical areas not known to be part of any kingdom, such as the Evil Forest and the Bad Lands. Pendleton Ward has confirmed that the Land of Ooo is a continent.

Map
Two different official maps of the Land of Ooo were released by Frederator Studios along with the original Adventure Time pitch documents: the seen in the infobox to the right and a  seen in the gallery below. Of these, the black-and-white one drawn by Ghostshrimp is probably more accurate for several reasons:
 * 1) Its general shape matches the aerial view of Ooo seen in "Business Time" (see picture in gallery below.)
 * 2) A slightly modified version of this map appeared on Princess Bubblegum's hologram map in "The Other Tarts."
 * 3) On the black-and-white map, the names of certain places match up with the names used in the show and by its creators, while some of the names on the color map do not.

Government
Ooo exhibits a mix of democracy, dictatorship (in some kingdoms), and feudalism as well as what appears to be monarchy. Most kingdoms are ruled by a Princess(es) or a King such as the Ice Kingdom. In the episode "Paper Pete " Mildwin is the democratically elected leader of the Moldos.The meeting of Ooo royalty acts like modern day Congress, in which all heads of state come together. Dictatorship has only been exhibited in "The Silent King" and "Too Young" where Xergiok and Earl of Lemongrab abuse their power. It is not known if there are any rules that apply across kingdoms have, but there is apparently a kingdom law mentioned by Princess Bubblegum in Too Young. It also appears there are villages and towns that have their own society like the Spikey Village and the town from "The Monster."

Religion
One of the primary deities worshiped in Ooo is Grob Gob Glob Grod. The Cosmic Owl apparently is also known as some kind of spiritual entity that appears in Croak Dreams. The show's creators have stated that Abraham Lincoln is a religious figure, although this has not been stated within the show. Ooo seems to have a number of other potentially godlike beings such as Party God and Death.

It is unknown whether anyone remembers Pre-Mushroom War religions. But in "Holly Jolly Secrets" many Christmas-themed items appear, but none of the characters show knowledge of the holiday itself (instead of Christmas, the holiday is called a day for wearing sweaters and watching secret tapes). Natasha Allegri has stated that the picture of a mother and child in Marceline's house is Mary and baby Jesus. However, there's no direct evidence that Marceline actually holds religious beliefs, and the significance of the picture has never been addressed by the characters. However, since Marceline is over 1000 (and is shown in Memory of a Memory as having lived through some massively desructive war, if anyone remembers it would presuably be her.

In the episode, "Marceline's Closet" just before Jake and Finn play 'cloud hunt', Jake mentions a central Buddhist theme. When asked what he is doing, Jake responds by saying that he is, "Just eliminating desire from my heart. It helps to pass the time." Which is the ultimate goal of the Eight-Fold path and a central idea behind the four noble truths. However, this could merely be the lingering influence of Buddhist and Christian thought, with Jake's goal being some sort of communion with "Glob".

Post-apocalyptic setting
Pendleton Ward, the creator of Adventure Time, has stated in an interview that the Land of Ooo is actually a post-apocalyptic world, the result of a global disaster called the Mushroom War, hence the ruined pieces of modern technology scattered across the land.


 * For a full list of scenes involving post-apocalyptic relics and technology, see: Mushroom War

Humans
It is also possible that Finn may be the sole human being left in Ooo (besides Susan Strong, whose species remains unknown), although it's unknown whether the Mushroom War was responsible for killing off most other humans. It's presumed that most of the other humans mutated into something, died or mixed with mutants.

For more information on Finn as the last human, see the "Status as the last human" section on Finn's article.

Trivia

 * In Jake's croak dream, the Earth in the background did not have a big "chip" missing. However, this could just be one of the Banana Man's astronomy instruments (such as the Saturn in the background was one of the Banana Man's tools when Jake, Finn, and the Banana Man were all in the lake).
 * While Pendleton Ward says the Land of Ooo is a continent, Adam Muto says it is the size of a smallish island nation.
 * The map of Ooo almost looks like an eagle or phoenix.