Santa Bárbara Castle dominates Mount Benacantil at 166 meters elevation overlooking Alicante's bay, commanding strategic views of the entire coastline and surrounding landscape. The fortress traces its origins to the late 9th century under Muslim rule, acquiring its current name when Alfonso X the Wise conquered Alicante in 1248 on Santa Bárbara's feast day. Rebuilt and fortified multiple times, the castle received its Renaissance transformation through military engineers Juan Bautista Antonelli and others who elevated it into a formidable bastion. Spanning approximately 400,000 square meters, the three-tiered complex represents one of Spain's largest medieval fortresses. Designated a National Historical Monument in 1961, it offers free admission and remains one of the Levante coast's most distinctive architectural landmarks.