The Ogrefist Hills

Partially framing the western edge of the vale, these desolate hills are said to be accursed by an ancient evil. During Nerath's height, several minor lords tried in succession to establish manors in these hills, but none lasted more than a single year. Somewhere in these hills hides the mouth of a tunnel leading up from the Underdark. It is also believed that a remnant of the old Arkhosian Empire lies somewhere in the caverns beneath this area.
-Kiris Dahn/Gorizbadd: The town of Kiris Dahn, built by human hands, stood strong against invaders for decades after the fall of the empire of Nerath. It had magical stones—created by tiefling artisans—that could kill anyone who attacked the town. The number of stones dwindled until all were spent. Eight years ago, the citizens of Kiris Dahn abandoned the town when faced with invading goblin hordes. The goblins overran the town and renamed it Gorizbadd. The town quickly fell into ruin, since goblins were far more interested in vandalism than in proper maintenance. A faction of kobolds took over the slums, since the goblins live mostly in what were once residences for the wealthier people of Kiris Dahn.
-Temple of Yellow Skulls: This mysterious temple, nestled among the rugged hills, might be the most infamous location in the area. Legend tells that a rakshasa prince summoned demons to this ancient shrine and bound them to his service by imprisoning their vital essences in gold-plated human skulls. None of these have yet been recovered from the ruins, but the story persists. Deep caverns beneath the ruins lead all the way down to the Underdark, and from time to time dangerous monsters of the deep places emerge here and prowl the nearby lands. Unknown to most people, however, is the fact that the Temple of Yellow Skulls is a Temple of Elemental Evil built in the ancient past by the followers of the Elder Elemental Eye (Tharizdun).