直布罗陀巨岩（英语：Rock of Gibraltar，或被称为｢海格力斯之柱｣或其拉丁语名｢Calpe｣）是位于的直布罗陀境内的巨型石灰岩。 该岩高达426米(即1,396呎)，而其北端邻近直布罗陀和西班牙的边境。该岩石是联合王国的皇家财产，其主权随同直布罗陀，在西班牙王位继承战争后的1713年，根据《乌得勒支和约》，自西班牙交到英国手上。而巨岩顶部的大部分属于一个自然保护区，作为现存250只直布罗陀猕猴的生境。被当地人称为｢apes｣的直布罗陀猕猴是欧洲唯一的野生猴子种群，它们和巨岩下面迷宫隧道网络，都是直布罗陀的旅游热点，每年吸引不少游客到访。

The Rock of Gibraltar (Spanish and Llanito: Peñón de Gibraltar, sometimes called by its original Latin name, Calpe,) is a monolithic limestone promontory located in the British overseas territory of Gibraltar, off the southwestern tip of Europe on the Iberian Peninsula. It is 426 m (1,398 ft) high. The Rock is Crown property of the United Kingdom, and borders Spain. Most of the Rock's upper area is covered by a nature reserve, which is home to around 300 Barbary macaques. These macaques, as well as a labyrinthine network of tunnels, attract a large number of tourists each year.