Castle of Alhama de Murcia Monument · Alhama de Murcia, Bajo Guadalentín, Murcia Fortress of Islamic origin built between the 11th and 12th centuries on a hill overlooking the town, divided into an upper alcázar and a lower albacar; it is declared a Bien de Interés Cultural. Photo: Martinvl (CC BY-SA 4.0) What to see and do in Alhama de Murcia