Bunker near Irún

A military bunker located in the Basque Country near the French border, part of Spain's defensive infrastructure from the mid-20th century. This structure is situated in a region that saw significant military construction during the post-Civil War period, when the Franco regime built extensive fortifications along the Pyrenees to defend against potential Allied invasion. The area around Irún and the Bidasoa River was strategically important due to its proximity to France and its position along key transportation routes.