See all Things to do in Ponce Ponce for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Caja de Muertos About Caja de Muertos (Coffin Island) is an uninhabited island just off the coast where you can visit a century-old lighthouse, empty stretches of beaches and a marked underwater snorkel trail. Ferries leave from the pier, weekends. $4. 787-842-8546 Add to Wish List
