4 — Rakaposhi & Ultar Sar Some mountains rise not gradually, but like a towering wall. Rakaposhi (7,788 m) drops almost six thousand meters from summit to valley, one of the world’s greatest vertical reliefs. Ultar Sar (7,388 m) stands nearby with sheer granite faces carved by uplift and deep glacial pressure. Their solid rock resists erosion, helping them keep knife-sharp ridges and clean, dramatic profiles.