Emyn Muil

In J. R. R. Tolkien's fictional Middle-earth the hills of Emyn Muil upon either side of Nen Hithoel are a maze of impenetrable rocky crags.

At the beginning of The Two Towers, Frodo and Sam, attempting to reach the Black Gate of Mordor, are lost in the eastern Emyn Muil for days until Gollum finds them. After a great deal of persuasion he agrees to show them the way, leading them south into the Dead Marshes.