Elendil Stone

One of the seven palantíri brought to Middle-earth by Elendil, this Stone was held in the tower of Elostirion among the Tower Hills. Unlike the other six Stones, the Elendil Stone could not be used to communicate with other palantíri, or to observe events in Middle-earth. Instead, it was set to gaze westward across the Great Sea, and through that Stone Elendil or his Heirs could see to the Undying Lands, as far as the haven of Avallónë on Tol Eressëa. The Elendil Stone remained in place until the end of the Third Age; after the close of that Age it was carried back across the Sea aboard the White Ship.