The Battery of Castillitos, also known as C1C1, is a fortification of coastal artillery support located in Cape Tiñoso, within the municipality of Cartagena.

The battery was built and blasted between 1933 and 1936, as a defensive belt to the strategic square of Cartagena by the dictatorship of Primo de Rivera. Castillitos was equipped with two coast cannons from the British company VickersArmstrong, model 38.1/45 cm (fifteen inches). These cannons had enough power to shoot a projectile of almost a ton 35 kilometers. ​

Its task was to protect the entrance to the bay of Cartagena next to its twin, the Battery of Ashes located on Cape Negrete, in a crossfire arrangement.

In 1942 a new firing direction was added and it was equipped with strategically placed radar and telescopic sights. It remained in service until 1994, when the NORTH Plan was implemented, which sought to make greater use of the resources of the Armed Forces.
Since then the battery has been abandoned and the victim of a progressive deterioration, with its unused cannons, until in 2009 the Ministry of the Environment decided to make an investment with which the fortification was restored and made visitable.​

Castillitos is located at a height 250 meters high, and its facade was built imitating a medieval castle, following a historicalist style with influences of eclecticism and modernism, ordinary in vogue at that time. The architecture of the drummer tends to hide by excavating in the mountain or imitating the texture of the rock to prevent its vision from the distance. Once inside the complex, each artillery piece has a machine room, gunpowder stores and spare parts and a cargo chamber.


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