There are many legends of Isola Bella: The tiny island in Lake Maggiore belonged to Italy's storied Borromeo clan for 500 years. But more recently, it played host to Louis Vuitton's resort show, a fantastical reimagining of one tale involving mermaids who transformed into flowers upon its shores—a notion translated by artistic director Nicolas Ghesquière into dreamy pastel gowns with blooms of organza and sweeping architectural hems, presented alongside custom-made headwear by a Roman opera atelier. After the show, the first ever hosted by the maison in Italy, other French houses followed, with Dior presenting a jewelry collection and Jacquemus opening a store. Here, tips for experiencing the region's legendary dolce vita.