The Ice Kingdom is a setting in The Land of Aaa. It is made up of hundreds of pointy, snow capped mountains, as well as several snowy hills. It is the location of the Ice Queen's castle as well as the home for a variety of ice-themed creatures. 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 

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The Ice Queen's Castle

by the Ice Queen herself. The Ice Kingdom is bordered on at least one side by water and is visible from Fionna and Cake's Tree Fort.