The three white towers in the Tower Hills were built by Gil-Galad for King Elendil. Elostirion was the tallest of the three towers, and housed a Palantír, which gives a view of the coast of Tol Eressëa. When the Kingdom of Arnor fell, the towers were watched over by the Elves of Lindon and the Rangers of the North.

Elostirion and the towers now server as a waystation and outpost for the Rangers and Elves over the western border of the Shire. From the western areas of the Shire, they can see the great white towers shining in silver light, which they observer with both awe and caution. The Gulf of Lune was visible from the towers going all the way into the sea, being able to see the Blue Mountains and Grey Havens.