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On a bright morning along the southeastern coast of Sardinia, the Escursione in Gommone from Castiadas launches from Lido Tamatetet into the marine-protected waters of Villasimius and Costa Rei. This four-hour inflatable-boat tour covers vaulted sea caves, hidden natural pools, and the small islands of Serpentara and Isola dei Cavoli, bringing you up close to dunes, posidonia meadows and cliffs that frame impossibly blue coves.

Skippers from ViaColVento SRL guide each outing, offering local stories about fishermen, shipwrecks, and the coastal lighthouses. Stops are planned for dips at the Piscine Naturali—shallow, calm basins teeming with small reef fish—plus beach days at Punta Molentis, the fossil-rich rocks of Cala Pira, and the sugar-white sand of Porto Giunco. On Isola dei Cavoli expect a short walk to the island’s lighthouse and small museum, where the view delivers a 360-degree panorama of horn-shaped bays and offshore rocks.

The geology here is immediate: sculpted granite outcrops meet sand formed from eroded carbonates, and the coastline is fringed by Mediterranean maquis—low, aromatic shrubs that perfume the air. Underwater, seagrass meadows of Posidonia oceanica support dense fish populations and visibly clearer water, a sign of the area’s strong protections. This tour spends most of its time inside the Area Marina Protetta di Capo Carbonara, preserving both marine life and shorelines.

What makes this outing special is its blend of accessible exploration and local expertise. The route visits beaches and bays that are difficult or impossible to reach by land, so you get a private-feeling coastline without a private price. The inflatable boat keeps the group nimble enough to anchor in tiny coves where snorkeling is excellent and the fish are unbothered by crowds. Guides pause to point out historical trivia—ancient coastal watch points, traditional fishing methods—and to explain conservation rules that keep the waters healthy.

Practicalities are straightforward: departures usually leave at 9:00 or 14:30 from Lido Tamatetet, trips run about four hours, and itineraries may shift with weather. Bring swimwear, reef-safe sunscreen, a hat, and a light windbreaker for the return crossing. Families, active travelers, and anyone wanting a focused taste of southern Sardinia’s best littoral scenery will find this a high-value slice of Mediterranean sea time. Tours meet at Lido Tamatetet in Castiadas, where staff check equipment and give a short safety briefing including signaling, lifejacket fitting, and guidance for entering the water. Excursions depart with enough fuel and supplies for refreshments; some operators provide masks and fins on request but bringing your own gear ensures a better fit. Note that outings operate subject to weather and require a minimum group to run; the operator ViaColVento SRL confirms departures advance. The pace favors exploration over speed, making this an ideal half-day escape for photographers and snorkelers alike.