Deatholme is the largest Scourge outpost in the Eastern Kingdoms outside of the greater Plaguelands, and appears to be jam-packed with temples, ziggurats and slaughterhouses. The variety of enemies in the area include undead nerubians, banshees, wraiths (Eyes of Dar'Khan), and human necromancers with their skeletal minions. Dar'Khan rules this odd assortment from the Tower of the Damned, along with his undead lieutenants - Mirdoran the Fallen, Borgoth the Bloodletter, Jurion the Deceiver, and Masophet the Black.
Deatholme appears to be an attempt to concentrate the elements of the bordering Eastern Plaguelands - blighted soil, ziggurats and slaughterhouses, and legions of undead, albeit lower-levelled - into one area. Once you enter the gates of Deatholme, the sky also has the same reddish-brown tint found in Eastern Plaguelands.