Great Siege Tunnels, Little Bay Travel Guide

The Great Siege Tunnels, also known as the Upper Galleries, represent a remarkable feat of military engineering born out of necessity during the Great Siege of Gibraltar (1779-1783). Faced with a seemingly insurmountable challenge of positioning cannons on the steep northern face of the Rock to cover a blind spot, Sergeant-Major Henry Ince of the Military Artificers Company proposed a daring solution: to dig a tunnel through the solid limestone.Construction began in May 1782, with workers relying on manual labor, picks, chisels, iron wedges, and gunpowder to carve through the dense rock. The conditions were arduous, with suffocating heat, smoke, and the constant threat of collapse. As the tunnels progressed, ventilation became a concern, leading to the creation of gun ports along the cliff face. These ports not only improved airflow but also provided strategic positions for cannons, allowing the British to target Spanish batteries.By 1790, approximately 4,000 feet (1,200 m) of tunnels had been constructed. The tunnels played a crucial role in Gibraltar's defense, and their value was recognized and expanded upon in later centuries. During the Second World War, the tunnel network was significantly extended to accommodate a garrison of 16,000 men, along with supplies, ammunition, and equipment. Today, visitors can explore the tunnels, witnessing the historical cannons, chambers, and passageways that tell the story of Gibraltar's military past. Multimedia displays enhance the experience, bringing the history of the tunnels to life.