Sentinel Hill is the main settlement in this region. It has many subquests that culminate in a large instanced dungeon called "The Deadmines" where you must find and kill Edwin VanCleef, the leader of the Defias Brotherhood. The entrance to the Deadmines is located in Moonbrook, a broken town controlled by the Defias Brotherhood in the south-west region of Westfall, near The Dagger Hills.