Palau's harbor serves as the sole mainland gateway to the Parco Nazionale Arcipelago di La Maddalena, a seven-island chain declared a marine protected area in 1994. The park's 180 square kilometers of granite outcrops and seagrass meadows shelter 700 species of flora and more than 150 fish species, including dusky grouper, painted comber, and two-banded seabream. Water transparency routinely exceeds twenty-five meters between May and October, a clarity driven by northwesterly mistral currents and the absence of riverine sediment. Snorkeling in Palau Sardinia centers on three anchor sites. Spargi's Cala Corsara offers shallow boulder fields colonized by Posidonia oceanica meadows, the endemic seagrass that stabilizes sand and oxygenates coastal water. Budelli's Spiaggia Rosa—closed to landing since 1998 to halt erosion of its pink-hued sand—remains visible from anchored catamarans; snorkelers drift along its offshore granite shelves where octopus and moray eel occupy crevices. Santa Maria's eastern shore provides the archipelago's calmest entry point, with depths of two to five meters and minimal surge. Tavolara Island, fourteen kilometers south, anchors a separate marine reserve established in 1997. Its limestone escarpments descend vertically into thirty-meter trenches where Atlantic horse mackerel school in summer. Snorkeling tours typically approach from the island's western flank, where a submerged saddle at eight meters creates an artificial reef colonized by sponges and bryozoans. Surface intervals allow views of the island's endemic Tavolara lizard, a species found nowhere else. Most snorkeling in Palau Sardinia tours depart between nine and ten in the morning, when winds remain light and visibility peaks. Four-island itineraries cover twenty to thirty nautical miles, with two to three snorkel stops lasting thirty to forty minutes each. Catamaran hulls provide stable platforms in the archipelago's frequent two-meter swell. Operators supply masks, fins, and shorty wetsuits; full-length suits are unnecessary given August water temperatures of twenty-five degrees Celsius. Entry to the marine park requires no permit for guided tours, though individual anchoring outside designated buoys carries fines beginning at three hundred euros.