Nan Dungortheb
Evil turns on evil, and Morgoth strives against Ungoliant, forcing her to flee to Nan Dungortheb, a region that she will afterwards hold in thrall.
Between Mindeb and the upper waters of Esgalduin lay the no-land of Nan Dungortheb; and that region was filled with fear, for upon its one side the power of Melian fenced the north march of Doriath, but upon the other side the sheer precipices of Ered Gorgoroth, Mountains of Terror, fell down from high Dorthonion. Thither, as was earlier told, Ungoliant had fled from the whips of the Balrogs, and there she dwelt a while, filling the ravines with her deadly gloom, and there still, when she had passed away, her foul offspring lurked and wove their evil nets; and the thin waters that spilled from Ered Gorgoroth were defiled, and perilous to drink, for the hearts of those that tasted them were filled with shadows of madness and despair.
Between Mindeb and the upper waters of Esgalduin lay the no-land of Nan Dungortheb; and that region was filled with fear, for upon its one side the power of Melian fenced the north march of Doriath, but upon the other side the sheer precipices of Ered Gorgoroth, Mountains of Terror, fell down from high Dorthonion. Thither, as was earlier told, Ungoliant had fled from the whips of the Balrogs, and there she dwelt a while, filling the ravines with her deadly gloom, and there still, when she had passed away, her foul offspring lurked and wove their evil nets; and the thin waters that spilled from Ered Gorgoroth were defiled, and perilous to drink, for the hearts of those that tasted them were filled with shadows of madness and despair.