Mordor ("The Black Land") - Mordor is the realm of Sauron. Mordor lies in the southeastern corner of the known lands of Middle-earth, and is a barren and blasted plain, surrounded by rocky mountains and foul swamps. It is home to the armies and slaves of its master, and some long-forgotten evils. Sauron's fortress in Mordor is the tower of Barad-dûr.