Cádiz opens historic María Moco military galleries to the public

The Cuevas de María Moco, a series of 18th-century military galleries located beneath the walls of Cádiz, have opened to the public for the first time. Situated within the grounds of the Instituto Hidrográfico de la Armada, these underground structures are part of the city’s historical defensive system known as the Frente de Tierra.

Contrary to local legends suggesting they are natural caves or a vast labyrinth, the site consists of man-made galleries designed to protect the city from enemy landings and underground mining attacks. The historical network included communication passages, counter-mine galleries, and rifleman galleries (galerías de fusileros).

The current public tour covers approximately 200 meters of a rifleman gallery, constructed with shell stone and brick vaults. The architecture includes specialized openings for firearms and ceiling vents to allow gunpowder smoke to escape. This opening is part of the ‘Cádiz, Emporio del Orbe’ cultural program, which highlights the city’s historical significance as a global commercial and scientific hub.