Gol-Gathad; also known as the "Tower of the Crossroads," is a fearsome outpost of Morgoth guarding the GrĂ´n Chasm, the crossroads of the Adar Road, the East Road, and the Bridge of Bones.

This castle is a much-feared tower of evil. The castle was built in the late Second Age by the Dark-Elves when they controlled the eastern lands. Since that time the tower has been used by the kingdoms of Adar, Drakhara, and now Morgoth. The tower is distinctive for it is constructed entirely of obsidian stone and iron, and is sometimes called the "Dark Tower."