"Fire glowed amid the smoke. Mount Doom was burning, and a great reek rising. Then at last his gaze was held: wall upon wall, battlement upon battlement, black, immeasurably strong, mountain of iron, gate of steel, tower of adamant, he saw it: Barad-dûr, Fortress of Sauron. All hope left him."
-J.R.R. Tolkien, The Lord of the Rings-