(Sindarin: 'Hill of the eye')
At the south end of NenHithoel, there were three peaks, of which AmonHen was the westernmost. TolBrandir stood in the middle, and AmonLhaw was in the east.
Hill of the Eye, where the Seat of Seeing stood, was close to the ancient north borders of Gondor. According to the maps made by Barbara Strachey, the summit of AmonHen reached more than 2250 above ground level
On top of the hill there was a high seat, buildt on four carven pillars. The seat could be reached by a stair of many steps and was in the centre of a wide flat circle, paved with mighty flags, and surrounded by an embattlement. When Frodo sat on the top of AmonHen and put on the Ring, he could see a vast circle reaching from Isengard to Barad-dûr, and from the MistyMountains to the delta of Anduin. According to Barbara Strachey, this would be a good 300 miles.
On its slopes the Fellowship was broken.
Also called Hill of Sight or Hill of the Eye in Westron.