Batería de Zuazo is a battery located in San Fernando in the Province of Cádiz, Andalusia, Spain. It was built by Felipe II to help defend the Isla de León.[1] It was protected under the general declaration of the Decree of April 22 of 1949 and Law 16/1985 by the Patrimonio Histórico Españo (Spanish Historical Heritage) and the Junta de Andalucía of 1993.