Le Vieux Château is just one of the landmarks located 1.2 mi (1.9 km) from central Île d'Yeu, so you might want to stop by for a few pics during your trip.
If visiting museums in Port-Joinville are on your list, you might want to check out the upcoming exhibitions at Abri du Marin, located in the heart of town. If you want to experience more of the culture Port-Joinville has to offer, head to Plage des Roses, Le Vieux Château, and Anse et Plage du Cours du Moulin.