Hyarmentir was the highest mountain peak in southern Aman. Ungoliant's Lair was located south of it.  Before they destroyed the Two Trees, Melkor and Ungoliant gazed upon the bliss of the Blessed Realm from one of its highest peak.
Hyarmentir is a Quenyan word.
- ↑ The Atlas of Middle-earth pgs. 6 & 7
- ↑ The Silmarillion: Quenta Silmarillion, "Of the Darkening of Valinor"