Plane of Existence

Planes of Existence, as defined here, are worlds in which they infinitely expand in both a horizontal and vertical direction, giving them no end in any direction.

Main Properties
Planes of Existence are rarely different in the basic properties they are made up of.

Infinite in all directions, Time is usually static throughout though variation does occur (Time passes normally but does not vary on location much if at all), Populations are usually very diverse but isn't always the case, and most often technology is vastly variant based on location.