The Château de Dinan, the showpiece of the medieval surrounding wall, is made up of three parts brought together in the 16C: the Guichet Gate, Coëtquen Tower and the five-storey duke's keep. Built in the 1380s, the keep gives you a good insight into the daily life of the dukes of Brittany. At the top, the rampart walk and terrace afford a unique 360° panoramic view reaching over several kilometres.