Caja de Muertos (English: Coffin Island or Dead Man's Chest) is an uninhabited island off the southern coast of Puerto Rico, in the municipality of Ponce. The island is protected by the Reserva Natural Caja de Muertos natural reserve, because of its native turtle traffic. Hikers and beachgoers are often seen in the island, which can be reached by ferry from the La Guancha Boardwalk sector of Ponce Playa. Together with Cardona, Ratones, Morrillito, Isla del Frio, Gatas, and Isla de Jueyes, Caja de Muertos is one of seven islands ascribed to the municipality of Ponce.