Top 5 Can’t Miss Check into the legendary Hotel Cala di Volpe, a 1960s design icon on the glitzy Costa Smeralda. Take a boat ride around the Maddalena archipelago, a protected nature reserve, and dive into the turquoise sea. Shop for breezy linen clothes at Ismeralda, which has several shops on the island. Taste porceddu , a Sardinian specialty, at the rustic Ristorante Antica Gallura.  Explore Cagliari, the island’s bustling capital. In the 1960s, the late Prince Karim Aga Khan IV bought the Costa Smeralda (Emerald Coast) in northeastern Sardinia, subsequently turning the area into a hot spot for royalty and celebrities. While the Costa Smeralda remains a major draw for high-rollers seeking the luxe lifestyle, there’s more to Sardinia than glamorous resorts.  Italy’s second-largest island is home to more than a thousand miles of coastline and a rugged mountainous interior.…