About forty kilometers southwest of Cartagena, the Rosario Islands Archipelago groups together some thirty islands and coral islets in the Caribbean Sea. Designated a natural national park, it harbors one of the best-preserved coral reefs on Colombia's Caribbean coast. The shallow waters, a translucent blue-green, make it a sought-after destination for diving, snorkeling and relaxation for both travelers and Colombians alike.

Practical info at a glance

• Access : boat departure from Muelle Turístico de la Bodeguita or Muelle de la Mulata in Cartagena — crossing of approximately 1 hour 30 minutes.
• Park entrance fee : entrance tax to Parque Nacional Natural Corales del Rosario is mandatory, payable at the dock.
• Recommended duration : full day; one or two-night stays possible on certain islands.
• What to bring : swimsuit, biodegradable sunscreen recommended (chemical creams damage coral).
• Accessibility : limited — beach access depends on each island's docks.

What you'll see

The archipelago has two main inhabited islands, Isla Grande and Isla del Rosario, surrounded by deserted islets. Beneath the surface, coral reefs shelter rays, parrotfish, barracudas and sea turtles. On Isla Grande, dense mangroves line the inner channels, accessible by kayak or glass-bottom boat.

History and context

The archipelago is part of the Parque Nacional Natural Corales del Rosario y de San Bernardo, created in 1977 to protect the coral ecosystems of Colombia's Caribbean coast. Historically, these islands served as a refuge for fishermen from the Cartagena region. Today, tourism pressure and coral bleaching linked to climate change are the main conservation challenges.

Highlights of your visit

Snorkeling on the reefs

The depths between 1 and 10 meters offer excellent visibility on calm days. The fringing reefs around uninhabited islets are the least disturbed. Prefer early morning outings, before the influx of day boats.

Isla Grande and its mangroves

The archipelago's largest island has walking trails and navigable mangrove channels. A few simple accommodations allow you to spend the night and enjoy the beaches after the excursion boats depart.

Scuba diving

Several operators offer guided dives to discover coral drop-offs and nearby wrecks. Beginner level is accessible; PADI training is available from Cartagena.

Acuario de Isla Tesoro

The aquarium on Isla Tesoro, managed by the Fundación Oceanario, features local marine species and turtle rehabilitation programs. Its educational value is genuine, though the infrastructure remains modest.

Photography tips

Light is optimal in the morning, before the sun reaches its zenith and washes out colors. For underwater photography, a waterproof housing or camera case is essential — turbidity increases in the afternoon. From the boat, the contrasts between the white of the islets, the green of the mangroves and the blue of the waters are sharpest in clear skies.

Location and access

The archipelago is located in Barbacoas Bay, approximately 35-45 km from Cartagena depending on which island. Shared boats and organized excursions depart each morning from the historic center's docks. Local agencies offer packages combining snorkeling, seafood lunch and aquarium visits. For a quieter stay, private transfers to Isla Grande are available.

Nearby places in Cartagena : Old Town Cartagena, San Felipe de Barajas Castle, Getsemaní Neighborhood.

Around the area

• Old Town Cartagena — colonial historic center listed as Unesco World Heritage, natural starting point before or after the archipelago.
• San Felipe de Barajas Castle — 17th-century Spanish fortress overlooking Cartagena Bay.
• Playa Blanca (Barú) — long white sand beach on the Barú peninsula, often combined with an archipelago excursion.
• Getsemaní Neighborhood — popular neighborhood in Cartagena, known for its murals and nightlife.