Cosmology

"There Are Other Worlds Than These" -The Dark Tower

There are many worlds that make up the Planes of Existence. Arranged in a wheel with the most lawful to the west and chaotic to the east, Good to the north and Evil to the south. In the middle is the material plane, a combination of all such forces. The material plane is the home of Toril of Forgotten Realms and other campaign settings like Greyhawk's Oerth, and Dragonlance's Krynn It is surrounded by its echo's of the Feywild and Shadowfell.

The inner planes represent the elemental chaos where Air, Water, Earth, and Fire each have a home. The Outer Planes are home to Devils, Demons, Angels, and Gods. To make note of a couple the Nine Hells is made up of nine layers each controlled by a ruling Devil or evil god. Arborea also known as Faerie and Arvandor is the elven heaven and home to the elven gods. The Abyss is known for endless layers ruled by chaotic Demons.

There are many demiplanes and pocket planes that are so small they don't properly fit onto the wheel. The land of Barovia, home of Strahd and Ravenloft Castle is one such place. There also exists the Far Plane. A plane that exists so far away from any other plane that it holds its own laws of physics and magical laws. Aberrations such as Mind Flayers and Beholders either come from here or have been shaped by its energy. The more knowledge a mortal has of this plane, the more madness consumes them.