Best attractions and places to see around Saint-Léonard, located on the Opal Coast in France, offer a mix of natural reserves, historical sites, and coastal viewpoints. The region is characterized by its diverse landscapes, including dunes and historical fortifications. Visitors can explore a variety of sites that showcase both natural beauty and historical significance.
Last updated: June 22, 2026
Highlight (Segment) • Natural Monument
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Highlight • Beach
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Very beautiful town with beautiful houses and a wonderful beach
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Incredibly beautiful paths - partly on wooden planks, partly through fine sand. A small, hidden natural paradise that can be wonderfully explored on a circular hike.
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beautiful monument
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Do not miss. Don't hesitate to go down into the crypt. Don't forget to look up inside the dome! Notre-Dame de Boulogne has a great history that you will be able to discover or rediscover with pleasure
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Dunes de la Slack is a beautiful nature reserve on the Opal Coast, between Wimereux and Ambleteuse. The area is named after La Slack, a river that flows through the dunes and flows into the sea at Fort d'Ambleteuse. The area is ideal for hikers and nature lovers. There are several walking routes available, including the 'La Baie de Saint-Jean' walk, which partly coincides with the GR120 du Littoral. The dunes are a varied dune area of the Parc naturel régional des Caps et marais d'Opale.
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The Basilica of Our Lady in Boulogne-sur-Mer is a Roman Catholic church built in the nineteenth century on the ruins of the medieval cathedral. The church building was recognized as a minor basilica in 1879. The basilica is dedicated to Mary of Boulogne. It is one of the largest crypts in France and is located beneath the Notre-Dame Basilica. The crypt is a 1,400 m² labyrinth displaying breathtaking works including goldsmithing, bas-reliefs, lapidaria from all periods, paintings and 4,000 m² of murals. More than 400 pieces are presented during the tour. The crypt is open from Tuesday to Sunday from 9:30 AM to 12:30 PM and from 2:00 PM to 5:30 PM.
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Family-friendly walk through a vulnerable dune area near the Slack river. Not suitable for wheelchairs. The route is well marked. The dunes themselves are not accessible due to their fragile nature, so you are obliged to follow the provided paths. The stretch of beach between Ambleteuse and Wimereux is impressive.
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The Château d'Hardelot is dedicated to promoting the history of relations between France and England. The mansion houses a collection of 19th century English furniture and decorative art. The castle is open from Tuesday to Sunday, from 10:00 a.m. to 12:30 p.m. and from 1:30 p.m. to 6:00 p.m.
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The primary natural reserve to explore is the Dunes of the Slack. This beautiful area on the Opal Coast, located between Wimereux and Ambleteuse, is ideal for hikers and nature lovers. It features varied paths through dunes and forests, and is part of the Parc naturel régional des Caps et marais d'Opale.
You can visit Hardelot Castle, a neo-Gothic mansion built in the 19th century with inspiration from Windsor Castle, retaining parts of a 13th-century fortification. Another significant historical site is the Murals at Fort de la Crèche and Pointe de la Crèche, an artillery battery from 1879 with a rich history, including occupation during World War II.
Yes, several attractions are suitable for families. The Dunes of the Slack offer varied walking routes through nature. Hardelot Castle provides an engaging historical experience with its restored interiors and gardens. Additionally, the Pilâtre de Rozier Square in nearby Boulogne-sur-Mer is a public park named after a French aviation pioneer, offering a pleasant outdoor space.
The Dunes of the Slack offer varied paths through dunes and forests, perfect for nature walks. For more extensive hiking options, you can explore routes like the 'Equihen-Plage Beach – Ecault forest loop' or the 'Customs trails – Ningles Beaches loop'. You can find more details and other trails on the Hiking around Saint-Léonard guide.
Yes, the region offers various cycling routes. Options range from moderate to difficult, such as the 'Hardelot Castle – Le Touquet-Paris-Plage loop' or the 'View over Wimereux – Hardelot Castle loop'. For a comprehensive list of routes, check the Cycling around Saint-Léonard guide and the Road Cycling Routes around Saint-Léonard guide.
The Pointe de la Crèche offers a breathtaking view of the coastline, extending up to Cap Gris-Nez. The Dunes of the Slack also provide scenic vistas with varied landscapes of dunes and forests.
Visitors appreciate the diverse landscapes, from the varied paths through dunes and forests at the Dunes of the Slack to the historical insights offered by Hardelot Castle. The stunning coastal views from Pointe de la Crèche are also highly rated.
At Hardelot Castle, you'll find a neo-Gothic mansion with interiors restored in Victorian and Napoleon III styles. You can learn about its history, including the Franco-English 'accord cordial'. The castle's gardens feature French and English ornaments, and it hosts temporary exhibitions, an Elizabethan circular theater, and various activities and workshops.
The Dunes of the Slack are a unique and varied dune area within the Parc naturel régional des Caps et marais d'Opale. It's characterized by paths that lead over sandy dunes and through forests, with some sections suitable for barefoot walking. The area is a protected natural reserve, making it a tranquil spot for observing local flora and fauna.
The Fort de la Crèche is an artillery battery originally built in 1879 and later modernized in 1935. It played a role during World War II when it was occupied by German forces, who reinforced the old French installations with concrete. Today, it stands as a historical landmark offering insights into coastal defense and wartime history.
Yes, in nearby Boulogne-sur-Mer, you can visit the Basilica of Our Lady. This 19th-century Roman Catholic church features one of France's largest crypts, a 1,400 m² labyrinth displaying artifacts, bas-reliefs, paintings, and murals.


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