The Île Sainte-Marguerite is the largest of the Lérins Islands, about half a mile off shore from the French Riviera town of Cannes. The island is approximately 3 kilometers (1.9 miles) in length (East to West) and 900 meters (3,000 feet) across.

The island is most famous for its fortress prison (the Fort Royal), in which the so-called Man in the Iron Mask was held in the 17th century.

Took the ferry (9 Euros round trip) over to the island. You will also explore the prison area (free for students) and museum.

It will be interesting to learn about the prisoners, such as the man in the iron mask and see the actual cells they were held in. Few things in the museum were explained in English.

There are no pictures allowed inside the cells. It looked like you could have parties or events in the fort as we saw a couple overlooking the water. Beautiful views of the riviera. You can walk around the island and there are beaches, forests and beautiful flowers. You will see a few restaurants as well and a lot of people were docking their boats.