Cast off for a dreamy coral-reef archipelago Tour the nearby Islas del Rosario by private boat Snorkel, swim, kayak, and paddleboard in tranquil turquoise waters Just 60 miles off Cartagena’s coast lie the Islas del Rosario, a coral-reef archipelago made up of 26 islands, many of them uninhabited. It’s well worth zipping out on a half-day (or all-day) trip to explore them—and the Conrad concierge can help arrange a luxurious, no-fuss excursion by private boat. Avoid the closer, more tourist-packed beach stops like Baru, and instead have your captain set a course for the more remote (and far more charming) Isla Majagua, typically a 45-to-60-minute boat ride from Cartagena. As protected national parkland, the island is sparsely populated—there’s a tiny rustic village, a few eco-hotels, and a handful of secluded villas belonging to wealthy Colombians. As you step off the boat you’ll be greeted with a glass of fresh-squeezed citrus juice, then you can indulge in your choice of island activities: scuba dive in the teeming turquoise waters, snorkel above the coral reef, trace the coastline on a stand-up paddleboard, or head out in a canoe or kayak for a gentle ride among the mangrove trees in Isla Majagua’s tranquil lagoon. Of course you could also opt for none of the above, and just snag a chaise on the island’s small sandy beach to while away the hours before lunch. The latter is served at a breezy alfresco café shaded by towering tropical trees that are home to all manner of exotic birds and darting lizards—and which, it turns out, make entertaining and ever-curious dining companions. The Conrad concierge can arrange for half-day or full-day private-boat excursions to the islands (Isla Majagua is just one of many itinerary options).