Step back in time at this remarkable fortress, which stands on the foundations of a 10th-century mosque. As you wander through its ancient walls, you'll uncover a rich tapestry of Roman, Moorish, and Spanish history. Don't miss the chance to climb the tower; the rewarding views over the city and the bay are well worth the effort. The castle also offers the unique experience of a sherry tasting in its historic cellar, a perfect way to complete your visit.