" They had come to the desolation that lay before Mordor: the lasting monument to the dark labour of its slaves that should endure when all their purposes were made void; a land defiled, diseased beyond all healing – unless the Great Sea should enter in and wash it with oblivion. ‘I feel sick,’ said Sam. "

― J.R.R. Tolkien , The Two Towers (The Lord of the Rings, #2)