Tabernas
Built in the XI century by the Arabs, the castle had its moment of glory when the Catholic Monarchs, Isabel and Fernando used it as a temporary residence while besieging Almeria, with its much more serious fortress.
It had been handed over to the Christians in 1489, and it is believed that its ruined state can be attributed to the Moriscos (Muslims who converted to Christianity to avoid expulsion from Spain but were later expelled anyway) who blew up the castle on seeing that all was lost.