Sella del Diavolo From the Water: Coves, Caves and the Devil's Saddle

Geologically, the headland is the seaward end of the same limestone spine that carries Cagliari's old town - Mesozoic rock, pale gold, soft enough for the sea to carve and hard enough to keep what it carves. The saddle shape that names it sits on the cape's summit ridge: two rises with a dip between them, unmistakable once seen from a boat's deck. Its height - about 135 metres - is enough to make the seaward cliffs dramatic without making them alpine, and enough for the landmark to function as the gulf's compass: every captain in the catalog uses the saddle as the day's reference point.

The landward side explains the boat routes too. Between the headland and the city runs the Poetto - the eight-kilometre beach that ends at the saddle's foot - and behind that the Molentargius wetlands. The coast south-west of the cape (Calamosca's side) faces the open mouth of the gulf; the north-eastern coves sit in its lee. Which coves swim well on a given day is, almost entirely, a question of which side the wind is on - the daily arithmetic every skipper in the comparison runs at dawn.

Running the seaward face from west to east, the way the boats do it:

Calamosca. The cape's western shoulder - a small sheltered beach beloved by locals, a tower and a lighthouse, and the trailhead for the walk up the saddle. Clear, simple water; the first stop on routes heading out of Marina Piccola.

Cala Mosca. The snorkelling cove: rocky shelves drop into clean water, small schooling fish hold over the stone, and the entrance of Grotta dei Colombi stands within swimming distance. The boats that advertise marine life mean this stretch.

Grotta dei Colombi. The Pigeons' Cave - the largest named cavern on the line, its mouth wide enough for small boats to nose toward the dimness. Pigeons and swallows trade the ledges; the acoustics do the rest.

Cala Fighera. The hidden one - cliffs on three sides, a seasonal fisherman's hut, deep water off the rocks. The cove most visitors never see from land, and the swim stop guides are proudest of. How the boats time it differs by format.

Cala Bernat. The pebble pocket under the saddle's seaward shoulder - shallow over sand, green-gold in the sun, the classic first-stop swim of the RIB routes.

Cagliari tells it like this: the devil came for the city - some versions say drawn by its beauty, some by its bishop - and the archangels met him in the sky above the cape. In the fight he fell to earth, and where he landed the rock took the shape of his saddle. The imprint is the dip you can still pick out from a boat's deck, and the chapel on the summit path keeps the story alive on the landward side.

Like most good legends it does geography's work: the name turns a landmark into a story your skipper can point at, and every boat in the catalog tells some version of it - the storytelling Safari skipper builds his whole act around the coast's legends, the caves captain runs it with the geology, and the flagship's guides land it somewhere between the two. You will hear it at least once on any day under the headland; that is part of the ticket.

The saddle is walkable: the trail from Calamosca climbs through pines and scrub to the summit ridge in about forty-five minutes of moderate walking, with the coves you would have swum from appearing below one by one. The view from the top is the water's own argument in reverse - Poetto's 8 km running away to Quartu, the gulf's mouth open to the horizon, and the city stacked behind you. Bring real shoes and water; the descent is harder on the knees than the climb.

The honest comparison: walking gives you the saddle itself and the panorama; the boat gives you the caves, the deep-water coves and the swim. They are not substitutes - the trails end where the best water begins, which is why many visitors do both, boat in the morning and the Calamosca walk another day. The full-day sailing option is the format for travellers who want the coast beyond the saddle as well; the walk stays on this side of the cape.

The headland photographs differently from every format in the water, and knowing which stop shoots which hour saves a memory card. Calamosca faces west: it owns the morning's calm light and the lighthouse-and-tower composition that anchors most route photos. Cala Mosca shoots best underwater - the rocky shelves and schooling fish are the gulf's reliable macro subject, best between the morning slots when the water is glassiest.

The Grotta dei Colombi is the drama shot: boat decks nose toward the mouth from mid-morning onward as the sun angle reaches inside, and the pigeon traffic on the ledges gives the wide lens its subject. Cala Fighera is the afternoon's - its three-sided cliffs hold shadow on one face and glow on the other once the sun leans west, which is when the sunset run passes it. Cala Bernat is the swimmers' proof shot: pebble clarity, green-gold shallows, best before the day's breeze roughens the surface.

And the saddle itself: the silhouette works from every deck but peaks from the Poetto side at dusk, when the rider's-seat shape reads black against the falling light - the shot the whole coast is named for, and the reason photographers forgive the evening formats their smaller swim count.

The headland changes character four times a year, and the change decides which of its stops reward you. In late spring the cliff flowers hold on the seaward face and the water runs at its clearest - the cave mouths are at their most photogenic before the summer plankton haze, and the deck crowds are thin enough that the caves boat feels private.

High summer is the saddle at full volume: warm water for long swims at Cala Bernat and Fighera, every cave deck running multiple departures, and the afternoon breeze that pushes the smart money to morning boats. September is the connoisseur's month on this coast - summer water, autumn light angles that reach deeper into the caves, and cliff Line crowds back to civilised. October runs the same play with shorter days; by November the headland belongs to the climbers and the cormorants.

The winter saddle is worth naming because it explains the coast: bare, sharp, quietly magnificent from the Bastione terraces across the water - and the reason returning visitors book their first morning boat the moment the season reopens.

The headland's place-names are a short course in how Sardinia's coast was used, and the boats read them aloud stop by stop. Calamosca carries its tower and lighthouse - the Saracen-watch line that guarded this shore, and the pilots' marker that still opens the gulf's approaches. Cala Mosca - the 'fly cove' - keeps the working name of the small harbour life that fished these shelves. The Grotta dei Colombi's pigeons and swallows hold their cave the way their ancestors held it when the name was cut. Cala Fighera's 'fig cove' remembers the vegetation before the fishermen's hut; Cala Bernat's name rides the same Catalan wash that runs through Cagliari's older vocabulary - a reminder that this gulf was Pisan, Spanish and Sardinian in turn before it was Italian.

The saddle's own name rides the loudest story, but the summit carries quieter ones: the chapel path's stations, the quarry scars where the city's golden stone was cut, the war-era positions on the cape that watched a different sea. Skippers tell the legend because it lands; the cliff's other names are the conversation for the second swim stop, when the deck has settled and the coast starts answering questions.

Travellers who want the full read: the city-side view adds the quarry and the bastions' angle on the same stone, and an afternoon in Castello closes the loop the water opened - the gulf's geology is the old town's walls, stacked.

The headland is the city's favourite foreground, and three vantage points read it differently. The Bastione Saint Remy terraces, ten minutes' walk up from the port quarter, frame the saddle across the harbour water - the classic postcard angle, best in the morning when the cliffs face their light, and the city's original 'first view' for arrivals by sea and rail alike.

The Poetto shoreline reads the saddle in profile: from the western lidos the whole headland runs its full length, cliff to saddle to trailhead, with the beach in the foreground doing the scale work that makes the 135 metres land. Sunset from the sand is the photographer's alternative to the sunset run - the same silhouette, the same gold, a different vantage and no booking.

And the third view is the honest one: from the Calamosca trail, midway up the saddle itself, the city turns its back and the view becomes the gulf - the whole sailing ground of the comparison table spread below, the boats working the cove line at the scale of toys. Walkers who climb it once understand the boat routes permanently; the descent returns you to the trailhead's beach, where the swim that started all of it is exactly as clear as the decks promised.

The headland rewards the double visit - one day by sea, one by trail - and the pairing has a grammar worth following. The boat day first: swimming the coves before knowing them from above gives the trail its references, and the cliff line's geography clicks into place at the first viewpoint when you can point at the water you swam. The reverse order works too, but the trail's views land differently once the coves have names attached.

The walk itself: start at Calamosca's beach road in the morning - the trailhead sits past the tower, marked and maintained - and climb through pine shade to the ridge in forty-five minutes of steady, moderate ground. The summit chapel, the quarry scars and the saddle's dip arrive in sequence; the gulf opens on the descent's lookouts, Poetto running its eight kilometres to Quartu below. Sturdy shoes, water, and a start before the heat are the whole requirements list.

And the closing option that ties the day in a knot: descend to Calamosca, swim off the tower beach, and watch the boat routes run the line you just walked - the deck's-eye view you now read from above. Few coastlines reward doing both halves this cleanly; this one was built for it.

The cove line reads differently underwater at every stop, and swimmers who know the sequence get more from each. Calamosca's beach water is the gentle entry: sandy shallows sloping to the tower's rocks, warmest of the line, where nervous swimmers find their feet. Cala Bernat runs the pebbles: clear green-gold over stone, a deeper drop just past the pocket's mouth, and the fish the shallows gather at the first mask's descent.

Cala Mosca is the snorkel stop without competition: rocky shelves, the schooling salema that turn with the light, and the Colombi cave's mouth within a comfortable swim for anyone guided by the crew's line. Cala Fighera is the deep-water swim - cliffs on three sides, no shallows to stand on, water so clear the boat's shadow reads on the bottom - the cove that converts confident swimmers into repeat visitors.

The rules that keep it perfect are few: no touching the posidonia meadows where they edge the coves, fins pointed away from other swimmers at the ladder, and the crew's line between the boat and the cliff respected on busy days. Follow those and the season's best water - June's clarity, September's warmth - is yours at whichever stop the captain names.