Netherworld

The Netherworld is a place between the world of the living and the world of the dead. The legend says that it was the place where souls rested for some time before permanently moving to the world of the dead. It can be accessed through an invisible teleport east of Banuta. Although some NPCs say this is the same place as Zarganash, but locations exist separately. 
Access to this area is obtained as part of the Feaster of Souls Quest.