The mythical "lost city" of the Earthmasters, located within some mountain on Harn, possibly in Orbaal. Often the object of fruitless search, the site is believed to be fully functional and to contain all manner of wonders.
The Keep on the Borderlands is set in Dyriamarch, a region of Melderyn claimed, but not effectively controlled by that kingdom. There is also a letter meant to be handed to the players before the adventure.
