Coffin Island © Schenko
On weekends, a ferry carries visitors from the pier at La Guancha on the Ponce waterfront to Coffin Island, a tiny uninhabited island five miles south of the city. The island, also known as Dead Man's Chest, is part of the Reserva Natural Caja de Muertos natural reserve, thanks in part to its native turtle traffic. There are five pristine beaches, including Playa Ensenada, Playa Larga, Playa Blanca, Playa Chica and the blue flag-designated Playa Pelícano. Beaches on the east side of the island are roped off during turtle-nesting season. What's more, there are a number of spectacular hiking trails throughout the interior of the island and visitors can also explore the 19th-century lighthouse at Caja de Muerto.