Outer Planes

Outer Planes is a collective term used to describe a subset of the known planes of existence in various cosmology models. The term refers to the placement of the planes being the outermost concentric sphere that made up the multiverse in the Great Wheel cosmology model. The term continued to be used in the World Tree cosmology model but referred to a different set of planes.

Outer Planes could refer to:
 * These seventeen planes of the Great Wheel cosmology model:
 * The Abyss
 * Acheron
 * Arcadia
 * Concordant Opposition/Outlands
 * Elysium
 * Gehenna
 * Gladsheim/Ysgard
 * Hades/The Gray Waste
 * Happy Hunting Grounds/Beastlands
 * Limbo
 * The Nine Hells/Baator
 * Nirvana/Mechanus
 * Olympus/Arborea/Arvandor
 * Pandemonium
 * Seven Heavens/Mount Celestia
 * Tarterus/Carceri
 * Twin Paradises/Bytopia
 * These twenty six planes of the World Tree cosmology model:
 * The Abyss
 * Arvandor
 * The Barrens of Doom and Despair
 * Blood Rift
 * Brightwater
 * Clangor
 * Deep Caverns
 * The Demonweb Pits
 * Dragon Eyrie
 * Dwarfhome
 * Dweomerheart
 * Fated Depths
 * Fury's Heart
 * The Gates of the Moon
 * Green Fields
 * Hammergrim
 * Heliopolis
 * The House of Knowledge
 * The House of Nature
 * The House of the Triad
 * Golden Hills
 * Jotunheim
 * The Nine Hells
 * Nishrek
 * The Supreme Throne
 * Warrior's Rest
 * Incorrectly refer to the Astral dominions of the World Axis cosmology.