The Myrnmaros Rift
Moradin’s Cleave is a massive mountain range that splits the continent of Altur into two parts. It is very nearly impassable. Before the construction of the Deeproad, only the bravest and most well equipped would attempt such a thing.
The only humanoids that make the Cleave their home are Goblinoids, otherwise a few species of bear, lion, goat and ape-like creatures inhabit the region.