A UNESCO World Heritage site since 1979, this remarkable park contains the region's richest fossil deposits. Several walks lead to superb viewpoints as well as to display cabinets, one of which contains the almost complete skeleton of a hadrosaurus or "duck-billed dinosaur" in situ. The nature reserve is only accessible as part of a guided tour, although a short 5km road tour enables visitors to admire these delightful landscapes in complete freedom.