Be sure to head downhill along the steep cobbles of rue du Jerzual and rue du Petit Fort , two of the best-preserved streets in Brittany. Both are lined with art galleries, antiques shops and restaurants, and lead down to the Vieux Pont (Old Bridge). From here the pretty little port, hemmed by restaurants and cafes, extends northwards, while the 19th-century Viaduc de Dinan soars high above to the south.