P Line Bunker near Madrid

A military bunker located near Madrid, Spain, part of the extensive P Line defensive network constructed during Francisco Franco's regime in the 1940s and 1950s. This network of approximately 6,000 fortifications was built along the Pyrenees and other strategic locations to defend against potential foreign invasion following the Spanish Civil War. The P Line represents a significant chapter in Spain's military history during the Franco era, with thousands of bunkers and defensive structures strategically positioned throughout the country.