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