Castelo de San Felipe
A 16th-century fortress guarding the entrance to the Ría de Ferrol—described by the British Admiralty as the best natural harbour in Europe. Together with Castelo da Palma across the ría, it defended Ferrol from naval attacks, including a failed British expedition in 1800. One of the best-preserved military fortifications in Galicia, now offering theatrical night visits in summer.
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