Castillo de Portilla stands at 780 meters altitude on a rocky outcrop near Zambrana in Álava province, embodying the region's medieval conflict and territorial disputes. Founded around 1040, this fortress witnessed the rival claims of Castile and Navarre throughout the 11th and 12th centuries before eventually falling to Castilian control in 1200. Archaeological evidence reveals continuous human occupation from the Iron Age through the Roman period. The castle appears prominently on the coat of arms of Araba, underscoring its historical importance. Today, restored with visitor facilities and interpretive panels, Portilla welcomes those interested in the region's medieval military heritage and provides panoramic views across the Álava landscape.
