The Mabohk is described as a hellish maze with a constant presence of dull green. Passages can range from impossible geometries to meticulously refined hallways to decaying areas not uncommon in appearance to regular world architecture.
When describing events in the Mabohk, capitalization is seldom used, save for quotations or when referring to Gascot through pronouns. Whether or not the Mabohk was created by Gascot or was some other dimension Gascot appropriated for his own use is unknown, but in either event he seems to have a good idea of however physics work in the maze. Once a prisoner is brought to the Mabohk, it is near impossible to escape of one's own volition. While totally possible to find the Gate by one's self, Gascot seems to indicate that no one will escape unless he lets them out through the Gate. Whether anyone but Gascot can actually open the gate remains to be seen.
Despite victims usually being mutilated in ways detrimental to body structure before entering the Mabohk, prisoners are usually unaffected by their injuries, to an extent. An example of this would be Harry Aman, who despite losing his throat, eyes, and legs before being taken to the Mabohk is able to see, talk, and move around unfeigned. Whether this is Gascot's doing or if the Mabohk has some sort of inhibition factor tied to it is unknown.