Why Caja de Muertos
Caja de Muertos, also known in English as Deadman's Chest or Coffin Island, is an uninhabited offshore destination located roughly 5.2 miles (8.4 kilometers) south of mainland Puerto Rico. Spanning an area of 0.59 square miles (1.53 square kilometers), the island forms part of the Playa barrio within the municipality of Ponce. Measuring approximately two miles long and reaching heights of up to 170 feet on its southwestern hill, it is easily recognized across the water from the southern coast.
Established as a protected wilderness region in 1980, the Caja de Muertos Nature Reserve encompasses the main island along with nearby Morrillito Key and Berbería Key. The area experiences a dry climate that supports native dry forest ecosystems, coral reefs, and unique local flora and fauna. The surrounding waters and shorelines serve as crucial habitat and nesting areas for traffic of protected species, notably including endangered hawksbill sea turtles.
Human activity on the island dates back millennia, evidenced by ancient stone art left by early visitors. Taíno natives used the island for fishing expeditions and attempted to retreat there during the Spanish conflict of 1511. Over subsequent centuries, it served as a hideout for pirates, a refuge for 19th-century independence patriots, and a gathering spot for persecuted masons. The origin of its name remains subject to several theories, ranging from the island's silhouette resembling a body laid out on a plateau to romanticized local legends of buried pirate treasure and historical maritime conflicts.
Today, the island is a popular location for hiking and beach activities. Visitors can explore marked trails leading through the dry terrain up to the Caja de Muertos Light, a historic lighthouse original built in the 1880s and later automated in 1945. The island features five distinct coastal areas: Playa Pelícano, a certified Blue Flag beach situated near the docking area; Playa Chica; Playa Blanca; Playa Ensenadita; and the protected, restricted-access shoreline of Playa Larga along the open Caribbean Sea.
As a non-residential reserve managed for environmental protection and tourism, visitor access relies on maritime transport. Outings, day trips, and eco-tours are traditionally reached via ferry, charter vessels, or catamarans departing from the La Guancha Boardwalk sector in Ponce Playa.
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