P Line Bunker in Sierra Espuña

A military bunker located in the Sierra Espuña region of Spain, part of the P Line defensive fortifications built between 1944 and 1948. The P Line, officially known as the Pyrenees Defense Organisation, was constructed during the final years of World War II to defend Spanish territory against potential invasion. This particular bunker represents the extensive network of semi-buried reinforced concrete structures that formed Spain's strategic defensive line along its northern borders.