A raised roadway that led westward out of Osgiliath to the Rammas Echor, the wall that surrounded the Pelennor Fields. Where it reached that wall, the entrance to the Pelennor was guarded by two towers, known as the Causeway Forts, and from there a road carried on westward towards Minas Tirith. Historically, the Causeway would have been one of the main thoroughfares of Gondor, running from its capital to its main fortress at Minas Anor. During the War of the Ring, though, when the crossings of Anduin were taken by the Enemy, the Witch-king used the Causeway to lead his forces to besiege Minas Tirith.