The Outlands

The Outlands is the plane between the Outer Planes. It is the plane of neutrality, incorporating a little of everything and keeping all aspects in a paradoxical balance - simultaneously concordant and in opposition. he plane has varied terrain, with prairies, mountains, and shallow rivers.
The outlands is circular, like a great disk. In fact, those who envision the Outer Planes as a wheel point ot the Outlands as proof, calling it a microcosm of the planes. That argument might be circular, since the arrangement of the Outlands inspired the idea of the Great Wheel in the first place.
Around the outside edge of the circle, evenly spaced, are the gate-towns: sixteen settlements, each built around a portal leading to one of the Outer Planes. Each town shares many of the characteristics of the plane where its gate leads. Planar emissaries often meet in these towns, so it isn't unusual to see strange paoirings, such as a celestial and a fiend arguing in a tavern while sharing a fin bottle of wine.
Given the fact that you can ride a horse in the Outlands from a heaven to a hell, a planar-themed campaign can be set there without the need for planar travel. The outlands is the closest the Outer Planes come to being lieka world on the Material Plane.

Town	Gate Destination
Excelsior	Mount Celestia
Tradegate	Bytopia
Ecstasy	Elysium
Faunel	Beastlands
Sylvania	Arborea
Glorium	Ysgard
Xaos	Limbo
Bedlam	Pandemonium
Plague-Mort	Abyss
Curst	Carceri
Hopeless	Hades
Torch	Gehenna
Ribcage	Nine Hells
Rigus	Acheron
Automata	Mechanus
Fortitude	Arcadia

SIGIL, CITY OF DOORS At  the center of the Outlands, like the axle of a great wheel, is the Spire - a needle-shaped mountain that rises high into the sky. Above this mountain's narrow peak floats the ring-shaped city of Sigil, its myriad structures built on the ring's inner rim. Creatures standing on one of Sigil's streets can see the city curve up over their heads and - most disconcerting of all - the far side of the city directly overhead. Called the City of Doors, this bustling planar metropolis hold countless portals to other planes and worlds.
Sigil is a trader's paradise. Goods, merchandise, and information come here from across the planes. The city sustains a brisk trade in information about the planes, particularly the command words or items required for the operation of particular portals. Portal keys of all kinds are bought and sold here.
The city is the domain of the inscrutable Lady of Pain, a being as old as gods and with purposes unknown to even the sages of her city. Is Sigil her prison? Is she the fallen creator of the multiverse? No one knows. Or if they do, they aren't telling.

Type

Dimensional plane