Ice Kingdom

The Ice Kingdom is a setting in Adventure Time. It is made up of hundreds of pointy, snow capped mountains, as well as several snowy hills. It is the location of the Ice King's castle as well as the home for a variety of ice-themed creatures. It is also mentioned that the Ice Kingdom was formerly Northern America before The Great Mushroom War. This is where the animated short took place, and is also the place that the princesses were held captive in "Prisoners of Love." The Ice Kingdom's population is fairly sparse, by the look of things, especially compared to other kingdoms in the land. The population consists mostly of penguins, with the occasional elemental creatures conjured by the Ice King himself. The Ice Kingdom is bordered on at least one side by water, as shown in "Evicted!," and is visible from Finn and Jake's Tree Fort.

Ice King's castle
The only known building (other than the Snow Golem's cabin from the episode "Thank You") in the kingdom is the Ice King's Castle. The castle is basically a hollow mountain capped by snow and ice, with the main entrance being a face-like set of windows near the top. Ice King's main living room has a fancy bed, a drum kit, and gym equipment. It usually has underpants and old pizza boxes on the floor. There is also a cage where Ice King keeps princesses. There are several secret rooms including what appears to be a basement filled with monsters and technology seen in "What is Life?" and a secret chamber full of ninja collectibles seen in "The Chamber of Frozen Blades." In the episode "Princess Monster Wife," it is shown there is a large network of tunnels and open spaces in the castle, one having herds of Ice Bulls, as well as a kitchen and dining room. In the episode "Beyond this Earthly Realm," it is shown Ice King has a room in his basement with a portal to the Spirit World, which is actually the Mystery Cave. This room seems to have fog billowing on the floors. In "I Remember You", Ice King has a "The Past" room, where he kept memorabilia of himself and some objects that he had when he was still Simon Petrikrov.

Ice Kingdom law
It is noted in "Prisoners of Love" that there is an Ice Kingdom Law, which contains at least one rule to follow, that being no trespassing. The Ice King accuses Finn and Jake of breaking this law. In "When Wedding Bells Thaw," Ice King implies that a traditional wedding in the Ice Kingdom apparently involves tying up the bride, lowering her on a rope, and touching her to the groom's beard. The ropes allegedly bring good luck to the marriage, although this may have been a lie to help him abduct princesses.

Inhabitants

 * Ice King/Ice Queen
 * Snow Golems
 * Snow Golem
 * That Guy in Xmas Sweater
 * That Other Guy in Xmas Sweater
 * Hand Snow Golem
 * Snowman Priest
 * Snow Men
 * Snow Monsters
 * Snowball
 * Roger
 * Penguins
 * Flower Girl Penguin
 * Guard Penguins
 * Gunter
 * Guntelina
 * Ice-o-pede
 * Ice Bull
 * Ice Toads
 * Iceclops
 * Ricardio
 * Kitten
 * Cow

Trivia

 * The Ice Kingdom is often seen in the background of scenes that take place near Finn and Jake's Tree Fort and the Candy Kingdom.
 * The Ice King's basement in "What is Life?," besides being filled with technology and ice constructs, has a long stairway with carvings of faces similar to the entrance's face-like window opening.
 * In the online game Jumping Finn, for some reason it is called the Frozen Land.
 * In "Holly Jolly Secrets Part I," Ice King inadvertently described the Ice Kingdom when asked about the weather in the Candy Kingdom while pretending to be Princess Bubblegum over the phone; saying "Oh, the usual. There's ice everywhere and it smells like penguins."
 * In "Evicted!," the Ice Kingdom is near a lake/ocean, probably Iceberg Lake . In "Five Short Graybles," Ice King sends Gunter away on an iceberg, again near a lake/ocean. Also in "Princess Monster Wife," a picture in the Ice King's room shows the kingdom above a body of water,and also in the party is over isla de senorita Ice king is rowing away in an ocean.
 * It is possible that the Ice Kingdom is where Simon Petrikov (Ice King) used to live before he lost his sanity. In "Holly Jolly Secrets Part II," in the videos that showed Simon, snow burying the buildings can be seen, which probably formed the Ice Kingdom over time.
 * Spirits can also be seen in the Ice Kingdom as shown in "Beyond this Earthly Realm."
 * In "Finn the Human," it is revealed that if the crown loses its master, it reacts by covering the world in ice. Therefor, the Ice Kingdom may be a result of an unsuccessful attempt to separate Simon from the crown.