Head for the chic holiday haven of the Costa Smeralda, the hub of which is the natural ancient harbour of Porto Cervo, with designer boutiques, trendy bars (most selling ice cream and pastries), acclaimed restaurants, and a few nightclubs. One of the best-equipped marinas in the Med, it attracts many world-famous yachting events and tournaments. Spend at least part of your holiday simply hanging out in Piazzetta San Marco, which has been the centre of social life here for hundreds of years and is a terrific place to spot celebs, from Roman Abramovich to Kate Moss, tucking into bowls of mussels.
Explore Neptune's Grotto (Grotta di Nettuno) near the town of Alghero, a sea-level cave-warren using dramatic lighting to enhance stunning stalactites and stalagmites. You get there via 656 Escala del Cabirol or 'goat steps' carved into the cliffside or by boat.
Visit Alghero's Anghelu Ruju Necropolis, a conglomeration of ancient tombs excavated from sandstone dating back to around 3000 BC, and one of the most significant archaeological sites in Sardinia.
Take the Trenino Verde (Little Green Train) between Arbatax and Mandas from June to September – one of the world's great small railways, and a veritable rollercoaster ride through mountains and meadows.
Take the kids to discover the massive bronze-age stone edifice at Barumini – like Stonehenge, its purpose is unknown.
Check out the Giara di Gesturi, a volcanic plateau rising from a broad plain. A nature reserve of ancient cork forests and shrubs, it's home to the cavallini della Giara, Europe's last wild horses, of which there are believed to be around 500, as well as wild boars and wildcats.
Take a trip to the rocky north of the island, to Capo d'Orso (Cape of the Bear), named for its huge wind-carved rock in the shape of a great crouching bear, looking out to sea. Also in the north, Stintino has one of the best beaches in Italy, La Pelosa.
Cool off at Diverland, a waterpark close to Cagliari.