βIt is only the promise of death that makes life worth
living.β
β Robert E. Howard
The Mortal Realms, and all its myriad names, is located along the bole of the great cosmic tree. Beneath it, in "reverse" or mirrored, is the plane of Otherworld, the Land of Faery. Trynnalta follows most of the same laws and physics of any other mundane world. Magic is real, but less common and broad in its application.
Life in the Mortal Realms is one of danger, pain and frustration. But, like anywhere else, it can be improved and there are places of great natural beauty and the touch of divinity can be found throughout the world. For better, or for worse.
If one subscribes to the traditional way the cosmos are described, then the Mortal Realms expands over the central area of the sphere that is the cosmos. This indicates two things; one is that the Mortal Realms are finite. Something exists outside of "Creation" therefor, if logic can be applied, there is a boundary. It also tells us, even as a finite plane, the Mortal Realms are immense and span the cosmos on a flat plane. Some, alternatively, believe Unknown proves that the cosmos expands indefinitely at some rate which causes the Outer Night to push back. This, however, may be wishful thinking as the entities of that foul place are almost all universally malevolent and may not need a reason to be hostile.