Cartagena: 4 Rosario Islands Snorkeling & Bioluminescent Plankton

Four Islands, One Day: Snorkeling & Glowing Water in Cartagena's Rosario Archipelago

You're picked up from your Cartagena hotel and taken by boat to four islands in the Rosario archipelago, where you snorkel in clear water, eat lunch and fresh fruit on the islands, and finish the day swimming in bioluminescent plankton after dark. Snorkeling gear, meals, and all transport are included. You just show up and follow the guide's timing.

Step-by-step itinerary

Stops and time at each

1. Rosario Islands4h
2. Isla Grande1h · entry included

Full day tour to Rosario Islands

• Meet in Cartagena city center
• Travel to Barú Island
• Start 4 islands activity with guide
• Snorkel in Rosario Islands
• Walk through Rosario Islands
• Seafood cocktail at Isla Cholon
• Relax and fruit tasting at Agual beach
• Lunch at Playa Tranquila, Isla Barú
• Plankton viewing in Laguna de Barú

The experience

There's something about the moment you slip into water so clear you can count the fish below you, and then, hours later, watch the ocean light up under your hands. That's what pulls people back to the Rosario Islands, and it's why this full-day tour to four islands works the way it does. You start with a pickup from your hotel in the walled city, Getsemaní, or San Diego, then head to Barú Island to meet your guide and the rest of the group. From there, the boat moves between the islands: snorkeling first in the Rosario Islands proper, where the water stays that impossible turquoise, then stops at Sin, Fiesta, and Isla Cholón for a seafood cocktail and time to breathe.

The rhythm of the day is built around what makes it different, the plankton. You're not rushing through four islands and heading back by sunset. Instead, lunch happens at Playa Tranquila on Barú, unhurried, with your choice of chicken, fish, or vegetarian, and then you wait. The light drops. The guide takes you out into the Laguna de Barú after dark, and when you move your hand through the water, it traces light. Bioluminescent plankton (tiny organisms that glow when they're disturbed) turn the ocean into something that doesn't feel real. You get a snack after, and by then you've done something most people don't: swum in four different islands and seen the water itself light up.

Snorkeling equipment is included, so you don't pack your own, and the stops are spaced so you're not exhausted by the time the plankton swim happens. Fruit tasting on Isla Agua Azul breaks up the afternoon, and the guide handles the timing so everything fits into one day without feeling rushed. Hotel pickup means you're not figuring out how to get to the dock, and the boat returns you in the evening.

What’s included

Your day includes hotel pickup from central Cartagena, boat transport to four islands in the Rosario archipelago, snorkeling equipment, snorkeling at the Rosario Islands, a seafood cocktail at Isla Cholón, lunch at Playa Tranquila (choice of chicken, fish, or vegetarian), fruit tasting at Isla Agua Azul, an evening bioluminescent plankton swim in the Laguna de Barú, and a snack afterward before returning to your hotel.

Options for this experience

4 options

Up to 15 people · Guide in English or Spanish07:30

Up to 2 people · Guide in English or Spanish07:30

Up to 15 people · Guide in English or Spanish07:30

Up to 2 people · Guide in English or Spanish07:30

You pick the guide language when booking. Options with the same name differ in details you'll see when you pick a date.

You see the exact price of each option when you check availability.See dates & prices

Before you book

Days and timesEvery dayDeparts at 07:30

AgesAdult (18 to 65 years) · Senior (66 to 90 years) · Youth (12 to 17 years) · Child (4 to 11 years) · Infant (under 4): free

GroupUp to 25

Live guideEnglish and Spanish

Audio guideEnglish and Spanish

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather or if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated 5 days ago

Good to know

Easy physical levelPublic transport nearbyNot for pregnant travelersNot for heart conditionsNot for back problemsInfants must sit on laps

Operated by GR TOURS Cartagena

Is this one for you?Book this if you want the main Rosario Islands experience (snorkeling, island stops, and meals) without arranging your own boat or timing, and you're willing to stay out until evening for the plankton swim, which is what makes the full day possible.

Traveler reviews

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Top questions

What languages is the guide in?

Live guide in English and Spanish.

Can children come?

Yes. Ticket types: Youth (12 to 17 years); Child (4 to 11 years); Infant (under 4): free.

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

What time does the tour start and when does it end?

The tour is full-day. Hotel pickup happens in the morning from the walled city, Getsemaní, or San Diego. You return in the evening after the plankton swim.

Is snorkeling equipment provided?

Yes, snorkeling equipment is included in the tour.

What islands do you visit?

You snorkel and visit Barú Island, Isla Grande, and the islands of Sin, Fiesta, and Isla Cholón. The main snorkeling happens in the Rosario Islands.

What meals and drinks are included?

Lunch (choice of chicken, fish, or vegetarian), a seafood cocktail at Isla Cholón, fruit tasting at Isla Agua Azul, and a snack after the plankton swim.

When does the bioluminescent plankton swim happen?

After lunch and the island stops, in the evening in the Laguna de Barú, when it's dark enough for the plankton to glow.

Is hotel pickup included?

Yes, pickup is included from hotels in the walled city, Getsemaní, and San Diego.

Can I bring my own snorkeling gear?

Equipment is provided, so you don't need to bring your own.

What should I bring?

Bring sunscreen, a towel, and a change of clothes. The tour involves water activities throughout the day.