Cézembre

Cézembre is an island in Brittany, in the Ille-et-Vilaine département of France, near Saint-Malo. The island is uninhabited, with a surface area of approximately 18 hectares (44 acres), a length of 750 metres (2,461 ft), and a width of 3,000 metres (9,843 ft).

The island features a fine sandy beach facing Saint-Malo on the south, and a steep and rocky coast around the rest of the island. As elsewhere in northern Brittany, the tidal range is among the highest in the world. Until the seventeenth century it was possible to reach the island at low tide on foot from St-Malo.

The island's beach is popular in summer with visitors arriving by yacht or motorboat and there are infrequent excursions from St-Malo, although landing is not possible except at high tide. A small restaurant serves lunches and prebooking is essential.

Cézembre was inhabited by a number of hermits over the centuries, and featured a monastery for a time. There were also five small chapels. Vauban fortified the island at the end of the seventeenth century, and it was used thereafter as a place of quarantine.