Cartagena 6-Stop Rosario Islands Tour: Snorkel, Aquarium & Lunch Review

With so many excursions in Cartagena Colombia to choose from, the six-stop format distinguishes itself in one important way: it doesn't ask you to choose between the Rosario Islands' different faces. You visit the historical sites (Bocachica Fort and the Escobar estate), you snorkel the marine lagoon, you visit the Oceanarium, you relax at three separate beach clubs and you enjoy a sit-down Caribbean lunch — all in a single well-paced seven-hour day.

The standard five-island tour is excellent, but the sixth stop here is the marine-lagoon snorkel at Isla Marina — a sheltered, calm-water site specifically selected for snorkeling rather than simply being a beach. The lagoon's shallow, clear water and protected reef system make it the best snorkel site in the archipelago for all levels, including complete beginners who have never put on a mask before.

The optional Oceanarium upgrade is also the most frequently cited highlight in the reviews. The dolphin performance is one of the few places in Colombia where you can watch a trained dolphin and sea-lion show in a purpose-built marine facility, and the shark observation tank consistently surprises first-time visitors with its scale.

The day follows a structured loop through the archipelago. Here is exactly what each of the six stops involves.

• Bocachica Fort — the 17th-century Spanish coastal battery guarding the southern entrance to Cartagena Bay; a 20-minute guided walk through the cannon emplacements and fortification walls
• Pablo Escobar's former island estate — a photo and narration stop at the cartel leader's crumbling Caribbean mansion; the guide provides historical context without glorification
• Isla Marina marine lagoon — the dedicated snorkel stop in a sheltered lagoon protected from ocean swell; mask, fins and life vest provided; a certified guide leads the swim
• Oceanarium (optional upgrade) — dolphin performance, sea-lion show and the shark observation tank; this stop is approximately 90 minutes if you choose the full experience
• Isla Grande beach club for lunch — sit-down Caribbean meal at the beachfront restaurant with hammocks and sun loungers available before and after eating
• Third beach club — final free swim and sunbathe stop before the return crossing to Cartagena

The base ticket includes snorkeling and three beach club passes. The Oceanarium is an optional add-on that can be booked at the same time.

• Round-trip speedboat from Cartagena's tourism pier
• Guided snorkel session with mask, fins and life vest
• Three beach club day passes (sun loungers at each stop)
• Caribbean lunch at Isla Grande (fish, chicken or vegetarian; soft drink included)
• Bilingual English–Spanish guide throughout the day
• Entry to Bocachica Fort
• National marine park fee

Reviews from over 1,300 travellers consistently surface the same preparation advice. Follow these and you'll have a smoother, more enjoyable day.

• Pre-book the Oceanarium add-on when you book the main tour — it sells out separately, and on-site availability isn't guaranteed
• The marine lagoon snorkel is in open water — bring a rash guard or UV shirt to avoid sunburn during the 45-minute swim
• Reef-safe sunscreen is mandatory inside the national park; bring your own as it isn't sold on board
• A dry bag for your phone is essential — speedboat crossings between islands splash the deck
• Bring Colombian pesos or USD cash for extra drinks at the beach clubs (card machines are not available at any of the island stops)
• The Oceanarium dolphin swim experience is a separate paid upgrade on site — not included in the Oceanarium add-on ticket
• If visiting with young children, the life vests at the snorkel stop are child-sized — the crew fits each one individually

What to pack

Pack these before you head to the dock or meeting point:

• Swimsuit and a towel
• Colombian pesos for the pier tax (~COP 31,500 per person) — cash only
• Extra cash or card for the optional Oceanarium entry (COP 40,000)
• Reef-safe sunscreen
• Dry bag for your phone and documents

What to leave behind

The following are not permitted on this tour:

• Pets
• Tablets and iPads
• Bare feet — closed footwear required on the dock and aboard the boat
• Weapons or sharp objects
• Unaccompanied minors

Real-world advice from the reviews and travel communities:

• Pre-book rather than buying from dock vendors. Cheaper street tours often mean overcrowded boats, rushed snorkel stops, and no shade on the return crossing.
• The snorkel stop is in a sheltered marine lagoon — visibility is typically excellent and the fish are accustomed to humans, making it ideal even for first-time snorkelers.
• The Oceanarium entry (COP 40,000) is not included and has to be decided before you board — if you want to swim with the dolphins, book the optional add-on in advance when you arrive at the Oceanarium counter.
• Bring your own reef-safe sunscreen — standard sunscreens damage the coral and the guides will remind you of this in the water.
• Afternoon seas get choppier as the day progresses. The 6-stop format means you spend more time on the water than shorter tours — a small amount of sea-sickness remedy is worth packing.
• The lunch stop at Isla Grande is included — fish, chicken, or vegetarian. Let the guide know your preference early in the day so the kitchen prepares it on time.

The 6-stop format appeals to travellers who want more than a single beach day but don't want to feel rushed. With a full seven hours and a structured itinerary, the pacing is generous — there is never a sense of being herded from one stop to the next. The Oceanarium option makes this particularly versatile for mixed groups.

• Travellers who want the maximum variety from a single day at the Rosario Islands
• Snorkeling enthusiasts who want a dedicated guided reef session — not just a splash near a beach
• Families with children who will enjoy the Oceanarium dolphin and sea-lion show
• Couples looking for a relaxed full-day island experience with multiple settings
• Visitors who want to see the historical sites (fort, Escobar estate) alongside the natural ones

Not ideal for

This tour is not a good fit for:

• Expectant mothers — open-sea speedboat rides are not recommended
• Guests prone to seasickness
• Anyone recovering from recent surgery
• Travellers over 70 years of age