The Opal Coast
Wild beaches, preserved bays, family outings.
From Le Sémaphore, the Opal Coast unfolds on foot, by bike or by sand yacht. Some highlights within an hour.
Domaine du Marquenterre
Nearly 1,000 hectares of dunes, sandy plains and marshes along a wild coastline. Wild boar, mouflon and woodland and marsh birds roam free.
Berck Beach
Twelve kilometres of fine sand with a Blue Flag: swimming, lazing about, sand yachting or paddleboarding, everyone finds their pace.
Nausicaá
In Boulogne-sur-Mer, the national sea centre bills itself as Europe's largest aquarium: over 58,000 marine animals and a mission to protect the oceans.
Hiking on the Opal Coast
Seven must-do routes along the coast, through forests and villages, including the Authie loop in Berck and La Forestière in Étaples.
Somme Bay
A member of the Most Beautiful Bays in the World Club and a Grand Site de France, the bay can be explored on foot with a guide or aboard the steam train, from Le Crotoy to Saint-Valery.
Bagatelle Park
The oldest amusement park in France still in operation: over 35 rides, roller coasters, rides for little ones, restaurants and green spaces.
International Kite Festival
Every April, for nine days, Berck beach welcomes giant kites from all over the world. In 2026 it also hosted the World Kite Cup of stunt kiting.
Authie Bay Seals
Harbour seals and grey seals can be seen in Berck all year round at low tide, from the end of the Chemin aux Raisins. The sandbanks appear from 2.5 hours before low water: check the tide times.
Montreuil-sur-Mer
Over a thousand years of history: 3 km of ramparts, a citadel built on the former royal castle and cobbled lanes where every era has left its mark.