Rosario Islands
Corales Del Rosario Y De San Bernardo National Natural Park (1977), A Coral Reef Archipelago Of About 28 Islands. The Standard Day Trip From Cartagena, With The Nearby Playa Blanca On Baru. · Cartagena, Bolivar
The Rosario Islands are a small coral archipelago about an hour by boat from Cartagena, and they are the standard escape from the city heat: white sand, clear green water, mangroves and small private islands with beach clubs. Most of it sits inside the Corales del Rosario y de San Bernardo National Natural Park, so visitors pay a park fee on top of the boat ticket. Isla Grande is the biggest island and has hostels and cabins, Isla del Pirata and Isla Rosario have beaches and lunch spots, and the Oceanario is a seawater aquarium on a small island. The reef here has suffered from overfishing, warming and decades of tourist traffic, so do not expect pristine coral. It is also crowded: day boats arrive together, and nearby Playa Blanca on Baru is busier still. Go early, go midweek, and treat it as a relaxed beach day rather than a wilderness trip. Bring cash for the park entrance, check what your ticket includes, and expect overpriced drinks and lunch if you buy on the island itself, so eat before you board.
Coral archipelago about 45 km south-west of Cartagena, reached by boat from the Muelle de los Pegasos or Playa Blanca on Baru, Cartagena, Bolivar, Colombia
Day trips normally leave Cartagena in the morning and return by mid-afternoon, giving roughly three to five hours on the islands. Overnight stays on Isla Grande and nearby cays let you see them after the boats go. The Oceanario and island clubs keep daytime hours, often closing by late afternoon. Rough seas can cancel boats with little notice, mostly from August to October, so confirm the trip the day before.