Mirrorworld

Mirrorworld (sometimes also called Reflection) is perhaps among the most known Elsewheres, if only through to how connected it is to the Lore of Reflections as a whole. It's a world that exists on the other side of reflecting surfaces, primarily mirrors. However there are many misconceptions about it out there, meaning that despite how close it is to Earth, it's still a very mysterious place.

Geography

Mirrorworld is a bit hard to describe, due to it being effectively a reflection of real world. It remains more or less indistinguishable from it... for as long as you stick close to places where both worlds are connected. This means areas close to reflective surfaces, especially large concentrations of those like cities. Mirrors are the strongest connection point, but to a much smaller degree water surfaces, non-reflective glass panes and even computer screens work.
The problem are areas without such connections. The mirrorworld there begins to make less and less sense, potentially declining all the way into a completely sanity-rending formless chaos. The closer it is to formless places, the more likely it is to encounter scary entities, as a result those are generally avoided by literally everyone that doesn't have a death wish. Then again, aside from the Mirrorlings, it's practically unheard of for people to visit the mirrorworld aside for those.
There isn't much to gain there, the place effectively being a defective copy of Earth - with not only more danger of hostile entities but also with the eternal threat of the area around you losing cohesiveness through damage to local mirror, which is something that instantly kill everyone that isn't a native.

Statistics

Summary

Size: Presumed Earth-size
Danger Level: 1-4/5
Usefulness: 0/5
Accessibility: 3/5

Danger Details

Lesser Aberrant Presence: 0-4/5
Greater Aberrant Presence: 0-4/5
Gods Presence: 0-2/5
Demihuman Presence: 1-3/5
Undead Presence: 0/5
Cryptid Presence: 0/5
Other Threats: Environment 2/5

Usefulness Details

Agriculture: 0/5
Mining: 0/5
Hunting: 2/5
Others: None