Duke Brini Castle 🏯. Although Nantes is a medium-sized French city, it feels quiet and there are not many people, but the urban part is also the essence, especially near the castle. The castle is free, the moat has dried up, and only grass and mice are left. The stone squat has witnessed the vicissitudes of history. After shopping, you can order a steak and a beer next to it. The price is much better than Paris.