The Îles de Lérins are a group of four islands located off the coast of Cannes, in the French Riviera. The two main islands are Île Sainte-Marguerite and Île Saint-Honorat. These islands are known for their natural beauty, clear waters, and rich history, making them popular destinations for tourists. Île Sainte-Marguerite is famous for its Fort Royal, which once imprisoned the Man in the Iron Mask. In contrast, Île Saint-Honorat is home to a Cistercian monastery that has been active since the 5th century. Together, the islands offer a peaceful retreat with scenic landscapes and cultural heritage.