1. In J R R Tolkein's
writings, the "prison of iron" in which Morgoth, (the lord of darkness, evil, and nasty things) resided in the First Age.
2. A really
excellent roguelike game with a large variety of
variants, in which the goal is usually to kill Morgoth. Unlike Nethack, focus is more on combat tactics, with a more serious flavour and no "special-case" puzzles.