Nan Dungortheb

Nan Dungortheb was the former abode of Ungoliant, and was cast in perpetual shadow through its narrowness and by enchantment. It lay close by Anach. The nameless gods of Anach were crude idols to deities worshipped in the First Age. This region was a land of dark forest east of Artanor where on a wooded mountain were hidden idols sacrificed to by some evil tribes of renegade men. The Lay of Leithian mentioned waters which caused madness which Beren Ercharmion]] drank on his travel south toward Doriath, and these were the waters of the Shadowy Spring from which Aros and Esgalduin flew. Because of the terrors of the island raised by Sauron's ring, runes of warding were carved in the mountains and along the coastal cliffs, and enchanted by the Noldor. Warning the foolhardy away and driving off the evil from the approaches to the sea, only blindfolded climbers coud ascend with unbroken resolve.