A pinnacle, tower, spire, needle, monument, or natural tower (German: Felsnadel, Felsturm, or Felszinne) in geology is an individual column of rock, isolated from other rocks or groups of rocks, in the shape of a vertical shaft or spire. It is a natural geomorphological shape and a structural denudation shape of the relief. It is an isolated, tall, and often also slender column or prism, reminiscent of a tower in its shape. A specific type of rock tower is the rock needle.
The Trango Towers (Urdu: ٹرینگو ٹاورز) are a family of rock towers situated in the Gilgit-Baltistan region, in northern Pakistan. The Towers have some of the world's largest cliffs and offer some of the most challenging big wall climbing opportunities. Each year, climbers from around the world embark on expeditions to the Karakoram region to climb these granite faces. The Trango Towers are situated to the north of the Baltoro Glacier and are part of the Baltoro Muztagh, which is a sub-range of the Karakoram. The highest point within the group is the summit of Great Trango Tower at 6,286 m (20,623 ft), the east face of which features the world's greatest nearly vertical drop.