SM

“The valley of Minas Morgul passed into evil very long ago, and it was a menace and a dread while the banished Enemy dwelt yet far away, and Ithilien was still for the most part in our keeping. As you know, that city was once a strong place, proud and fair, Minas Ithil, the twin sister of our own city. But it was taken by fell men whom the Enemy in his first strength had dominated, and who wandered homeless and masterless after his fall. It is said that their lords were men of Númenor who had fallen into dark wickedness; to them the Enemy had given rings of power, and he had devoured them: living ghosts they were become, terrible and evil. After his going they took Minas Ithil and dwelt there, and they filled it, and all the valley about, with decay: it seemed empty and was not so, for a shapeless fear lived within the ruined walls. Nine Lords there were, and after the return of their Master, which they aided and prepared in secret, they grew strong again. Then the Nine Riders issued forth from the gates of horror, and we could not withstand them. Do not approach their citadel. You will be espied. It is a place of sleepless malice, full of lidless eyes. Do not go that way!”
― J.R.R. Tolkien, The Lord of the Rings