This fort, built on October 6, 1938, by the brigades, is made of reinforced concrete and stands on a stone base. Access to the interior is through a corridor containing a small closet on the right. The central space has a higher surface area, as it corresponds to the location of the machine gun. The walls facing the Barcelona coast have two firing and observation ports.
The bunker served the population of Santa Susanna as a defense against the danger of bombing, both from air raids by the Italian fascist air force, allied with Franco, and from possible Francoist landings. Beginning in August 1937, the government of the Republic and the People's Army carried out significant defensive fortification works along the Maresme Coast and the rest of Spain. Santa Susanna, then known as Montagut de Mar, had two fortifications: a larger one strategically located near the stream (now lost due to sea erosion), and this bunker on Playa de las Dunas.
After the Civil War, during the 1940s, the Army maintained these structures as observation detachments to defend against a possible Allied invasion. During the 1950s, they became homes for immigrant families arriving in Catalonia. Subsequently, they were gradually forgotten until 2015, when the Department of Culture of the Santa Susanna City Council decided to restore the bunker as a historical landmark.
Of the more than 50 bunkers found on the Maresme Coast, the Santa Susanna bunker is the first to be declared a Cultural Asset of Local Interest (BCIL). This distinction led to the fort's restoration in late 2008. The work consisted of cleaning it, redesigning the space, and consolidating the structure, as well as documenting and marking it with the aim of promoting the Civil War bunker as a historical and tourist attraction.
