The Iles de Lérins represent nature and an escape from the city - in addition to their great historical, cultural and environmental importance. They irresistibly catch the eye of people strolling along La Croisette. They are also one of the starting points of the city’s history. To get there, simply board one of the shuttles from Quai Laubeuf, at the western tip of the old port, which take just 15 minutes to connect the city with the archipelago formed by Île Sainte-Marguerite and Île Saint-Honorat. The two islands give visitors a different view of Cannes, and offer exceptional quality both in terms of their heritage and the environment. 

https://www.cannes-destination.com/must-see/the-iles-de-lerins-cannes