A 5min boat trip from Le Gosier (or a swim from Datcha beach for strong swimmers) takes you to the Îlet du Gosier, a little island dominated by its red and white lighthouse. During the weekend, the island is busy with families and groups of friends who come here for a barbecue. Snorkelling enthusiasts can head to the east or west of the island where they can explore the coral reef, but should avoid the far side of the island where the sea is too rough. Bring a picnic.