Bunker 1 on Cavaió Beach is located on top of the rock in the Cavaió-Portinyol area, next to Ferran de Pol Park, in the municipality of Arenys de Mar, in the Maresme region.
To get a good view, the best place is from Cavaió Beach.
In 1937, in the middle of the Spanish Civil War, the different mayors of Maresme met in the town of Mataró, and decided to build different bunkers along the coast.
These structures, facing the sea, had the aim of trying to avoid a landing on the Maresme coast.
Bunker 1 of Cavaió Beach is a structure made of reinforced concrete, which was originally covered with stones to make it more difficult to locate from the air.