Yacht-spotting is top of the to-do list in Sardinia. Russian oligarchs and Arabian royalty often float their 200-plus-footers around the island’s coast. On this trip, you’ll be the spotted rather than the spotter. Your ship will be a catamaran and your course will take your through the Porto Conte marine park. The naturalist Jacques Costeau described this part of Sardinia as ‘one of the most beautiful corners of the Mediterranean’. The park is edged by sheer cliff faces and the water is gin-clear. As you sail, you’ll catch a glimpse of the island of Foradada, a huge rocky stack that punches out of the sea. You’ll also float by the unspoilt beach of Cala Dragunara, where you'll have a bit of time to go swimming or snorkeling.