(S. 'hill of wind')
The southernmost of the WeatherHills?. A watchtower was built by Elendil at the founding years of Arnor, which held the chief Palantír of the North. The tower of AmonSűl stood near the central lands of Arnor, but after the division, it stood on the point where the borders of Arthedain, Cardolan and Rhudaur joined. Because of this, many battles were made for its possession. The last was in III 1409 when the confederate forces of Angmar and Rhudaur destroyed the tower. The Palantír however was saved and transported to Fornost.
Centuries later, it was the campsite of Strider and the Hobbits on their way to Rivendell, where they were attacked by the Ringwraiths.
Called Weathertop in Westron.