Île de Sein is a small island located off the coast of Brittany, France. It is part of the Finistère department and is known for its picturesque landscapes and traditional Breton culture. The island covers an area of about 2.5 square kilometers and has a population of around 200 residents. The island is famous for its stunning beaches and clear waters, making it a popular destination for tourists. Visitors can explore its charming streets, enjoy local seafood, and learn about its maritime history, including its role during World War II. The island is accessible by ferry from the mainland.