Castell d'Ambra is a 13th-century Islamic fortress perched 264 meters above sea level on a rocky ridge in Pego, Valencia. Constructed with rammed-earth (tapial) walls reinforced by four rectangular towers, the castle included defensive features such as a barbican with double-gate entry, a guard room, approximately 20 residential dwellings built into the rocky terrain, and a cistern for rainwater collection. After Christian conquest, it served multiple lords before losing military importance around 1280 when the town of Pego was established nearby. Archaeological excavations reveal bronze coins from King James I's reign, documenting the fortress's occupation through the region's turbulent transition from Islamic to Christian rule.