Numerous large cays ( including what used to be one of Fidel Castro 's favorite fishing spots ; the ArchipiÃ lago Jardines de la Reina ) characterise both the northern and southern coasts . Numerous large cays ( including what used to be one of Fidel Castro 's favorite fishing spots ; the ArchipiÃ lago Jardines de la Reina ) characterize the southern coasts , while the northern coast is lined by Jardines del Rey of the Sabana-Camag Ã 1\/4 ey Archipelago .