A city that is directly on top of the Netherworld, in Rumo & His Miraculous Adventures, it serves as the easiest to enter entrance to the area of Stonewater Grotto. The fog which surrounds Murkholm is a living creature, like the noctunomath Professor Ostafan Kolibri discovers. The beings of Murkholm are called Murkholmers, and have a piercing stare.