Best attractions and places to see around Cayeux-Sur-Mer include a diverse range of natural landscapes and historic landmarks on the Picardy coast. The area is characterized by its extensive shingle beach, a long wooden boardwalk, and its location at the southern entrance to the Baie de Somme. Cayeux-sur-Mer offers opportunities for nature observation, walking, and cycling, reflecting its maritime character.
Last updated: May 26, 2026
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Hourdel Lighthouse is a lighthouse on the common Cayeux-sur-Mer, it is built on the south side of the Bay of Somme, at the end of the point of Hourdel.
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The cliffs are made of chalk and are impressive to look at.
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Walk along the canal, enjoy the view from the benches
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The cliffs around the beach of Ault are composed of chalk from the Upper Cretaceous, more precisely from the Turonian and Coniacian (around 83 million years ago to 90 million years ago). They are strewn with flint nodules which highlight the subhorizontal stratification planes (the formation of flint has already been discussed in Discovery of the geology of the cliffs of Étretat, presentation of an excursion from the beach of Tilleul (Antifer) to the Porte d'Amont (Étretat Nord)). The relative proportion of chalk and flint is around 90-95% chalk to 5-10% flint. Flint horizons are stratigraphic markers. On the cliffs of Ault, the regular flint band called Seven Sisters is recognizable and characterizes the boundary between the Middle Coniacian and the Upper Coniacian (around 87 million years ago). The boundary between the lower and middle Coniacian is marked by the Shoreham 2 marl level, which is more difficult to identify. These lithostratigraphic markings allow in particular the correlation of distant deposits, such as between the Normandy and Picardy coasts, or between the French and English coasts.
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Ault is a beautiful place. Beautifully laid out paths above and below the impressive cliffs. The town center is perfect for relaxing. There are a few cafes and bistros for when you get a little hungry. There are benches everywhere where you can sit and enjoy a few minutes of peace and the wonderful views.
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the magic of the Bay of Somme and the marriage with the sea. Just pay attention to the tide times but there is a path at the top and protects you
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A great place on the Bay of Somme. There are beautiful views in all directions.
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A lighthouse at the very tip of the country.
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Cayeux-sur-Mer offers a rich variety of natural landscapes. You can enjoy its extensive shingle beach and the famous boardwalk lined with colorful beach cabins. Don't miss the Ault Chalk Cliffs, a notable geological feature nearby. The Pointe du Hourdel is excellent for seal watching, and the Hâble d'Ault Marsh (Nature Reserve) is a haven for birdwatching and nature walks.
Yes, the region is ideal for walking and cycling. A highlight is the White Route of the Bay of Somme, a 3 km car-free path through the dunes connecting Hourdel to La Mollière. You'll find many marked trails in the Hâble d'Ault Marsh, perfect for exploring on foot or by bike. For more detailed routes, you can explore the hiking trails and cycling routes around Cayeux-sur-Mer.
The best place to observe grey and harbor seals is at the Pointe du Hourdel, especially at low tide when they lounge on the sandbanks. For birdwatching, the Hâble d'Ault Marsh (Nature Reserve) is a must-visit, home to around 270 different bird species. The Fishing Port of Hourdel also offers great views of France's largest seal colony.
Cayeux-sur-Mer has a rich maritime history reflected in its landmarks. You can visit the Benoît Champy Rescue Boat, a 19th-century lifeboat classified as a Historic Monument. The Le Hourdel Lighthouse is a significant landmark marking the entrance to the Baie de Somme. The Chapel of the Sailors also testifies to the town's deep maritime past. Additionally, the Petit Train de la Baie de Somme offers a scenic heritage railway experience.
Absolutely! The long shingle beach and the boardwalk with its colorful beach cabins are great for families. The White Route of the Bay of Somme is a car-free path suitable for family walks and bike rides. The Petit Train de la Baie de Somme provides an enjoyable scenic journey for all ages. Many natural sites, like the Pointe du Hourdel for seal watching, are also popular with families.
The warmer months, typically from late spring to early autumn (May to September), are ideal for outdoor activities in Cayeux-sur-Mer. During this period, the weather is most favorable for enjoying the beach, walking, cycling, and wildlife observation. Summer offers a lively atmosphere with various activities.
Yes, the area provides diverse cycling opportunities. You can find several mountain biking trails, such as the 'Lighthouse far away from the beach – Saint Valery sur Somme loop' or 'The Hâble d'Ault Route – Belvedere loop'. For road cycling, routes like 'Strada biancha Picarda – Le Hourdel Lighthouse loop' are available. Explore more options in the MTB Trails and Road Cycling Routes guides for Cayeux-sur-Mer.
Visitors particularly appreciate the natural beauty and tranquil atmosphere. The long beach, the iconic boardwalk with its colorful cabins, and the opportunities for wildlife observation at Pointe du Hourdel are highly valued. The car-free paths like the White Route of the Bay of Somme are also popular for their scenic views and ease of access.
Beyond the famous beach cabins, Cayeux-sur-Mer is known for its charming seaside cottages and 19th-century 'Belle Epoque' villas, which contribute to its nostalgic coastal ambiance. The old casino building, now a cultural space, is another example of this architectural heritage.
Yes, the Maison de la Baie de Somme et de l'Oiseau (House of the Somme Bay and the Bird), located near Lanchères, is a visitor center and nature museum. It offers valuable insights into the rich ecosystem and biodiversity of the Baie de Somme, including its migratory birds and marine life.
Yes, Cayeux-sur-Mer is one of the stops for the Petit Train de la Baie de Somme, a heritage steam railway. This offers scenic journeys around the Baie de Somme to picturesque towns like Saint-Valery-sur-Somme and Le Crotoy, providing a unique way to see the region.


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