Chalk hills of the northern cuesta of the Boulonnais
The chalk hills of the northern 'cuesta' of the Boulonnais extend along a distinctive relief that testifies to the complex geological history of the region. These hills are the result of the erosion of limestone formations dating back to the Cretaceous period, about 100 million years ago, when this area was underwater.
Bainghen
The site is accessible all year round
Free
Viewpoint
Facilities
- Dogs welcome
- Car parking
Geosite details
The chalk hills of the northern cuesta of the Boulonnais extend along a distinctive landform that speaks to the complex geological history of the region. These hills are the result of the erosion of limestone formations dating back to the Cretaceous period, about 100 million years ago, when this area was underwater. Limestone, mainly composed of fossil shells, is an essential resource that has shaped the identity of the region.
The site is home to marked trails that wind through flower-filled meadows and woodlands, allowing visitors to take in a variety of landscapes. In summer, rare plant species, including several types of wild orchids, can be seen blooming in the chalk grassland areas. From the summit of Mont Dauphin, which rises to 203 metres, the panoramas offer breathtaking views of the surrounding valleys and the sea, in addition to the opportunities to observe a variety of wildlife.