From Tolkien Gateway
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The Morgul-road ran from Osgiliath through the Morgul Vale past the city of Minas Morgul[1] over the Morgul Pass to the valley between the Ephel Dúath and the Morgai, over a bridge of stone[2] and through a jagged rift in the Morgai out into Gorgoroth and on to Barad-dûr.[3]