A range of gentle chalk hills broken by steep gorges (as a result of the the breaking of the Ered Luin in the end of the First Age). The hills ranged between 750 to 950 feet in height and range over 1,150 square miles. They were the home of Nandorin elves. The names of the three towers were Elostirion (S. Starfortress), the middle and tallest, Anárostirion the northern, and Ithilostirion (S. *Crystal-fortress), the southern. Each was manned by several dozen mortals during the times of Arnor.