When the French flag is hoisted, you can visit the Fort.
You can access to it at low tide from the beach called l'Eventail, in front of the Castle.
You will cross the beach from the Porte Saint-Thomas or the car park la Galère (300 meters by foot). The tickets are sold at the gate of the Fort.
An adventure guide book for kids is available for free. They will be able to visit the Fort National and ask questions to the guide.