|Ice King's Castle|
|Name||Ice King's Castle|
|Quests||Have You Seen This Penguin?|
The only known building (other than the Snow Golem's cabin from the episode "Thank You") in the Ice 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 keeps memorabilia of himself and some objects that he had when he was still Simon Petrikov. It is revealed in "Frost & Fire" that the Ice Castle can be controlled like a giant robot. This castle, along with presumably everything in it, is destroyed by Flame Princess. Ice King then moves in with Finn and Jake and leaves the reconstruction of his kingdom to his penguins.
- Chamber of Frozen Blades
- This is the place where you can find Fionna's Crystal Sword.