Arab Castle of Blanca Monument · Blanca, Vega Alta del Segura, Murcia Image of Blanca, not of the place itself. Fortress of the 11th and 12th centuries built on the Peña Negra as a lookout for the defence of the Valle de Ricote, with a large hollow central tower. After the Reconquest it became a symbol of the seigneurial power of the Order of Santiago. Photo: Octavoenanito (CC BY-SA 3.0) What to see and do in Blanca