Castell de Sant Ferran stands as Catalonia's largest man-made monument, sprawling across 32 hectares on a hill overlooking Figueres. Built between 1753 and 1766 by Pedro Martín Cermeño and Juan Martín Cermeño, the fortress was constructed to replace Fort de Bellegarde after the Treaty of the Pyrenees ceded it to France, fortifying Spain's border. Named in honor of King Ferdinand VI, the complex could accommodate 6,000 soldiers and their barracks. The castle saw action during the Peninsular War before serving as a military barracks and prison; Spain's Republican government held its final civil war meeting in its dungeons in 1939. Now open to public visits since 1997, it remains a powerful symbol of Spain's military heritage.
