Saint-Malo is famous for its historic walled city, known as Intra-Muros. Take a leisurely stroll along the cobblestone streets and admire the beautiful architecture of the old buildings. Visit the Saint-Malo Cathedral, which dates back to the 12th century, and explore the various museums and art galleries within the walls. Don't forget to climb up to the top of the ramparts for stunning views of the city and the sea.