Roca Partida (English: Parted Rock) ranks as the smallest of the four Revillagigedo Islands, part of the Free and Sovereign State of Colima in Mexico. This uninhabited island encompasses an area of only 1.4 hectares (3.5 acres), and many divers rank it among the most beautiful in Mexico. Divers must obtain permits from the Mexican Armed Forces to enter into this military zone..