Best natural monuments around Saint-Nazaire encompass a diverse range of landscapes, from extensive marshlands to a rugged coastline. The region features significant natural attractions, including a vast regional natural park and notable prehistoric sites integrated into the natural environment. These sites offer insights into both geological formations and ancient human interaction with the landscape. Saint-Nazaire's natural setting provides varied opportunities for outdoor exploration.
Last updated: May 4, 2026
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This megalithic tomb, built around 4300 BC, is the oldest monument in Loire Atlantique, dating back over 6,000 years.
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Actually, it's more of an allée couverte—but I don't even want to know what Komoot translates into. Fifty meters further on, there's a second collapsed dolmen.
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A small additional highlight on the beautiful path along the Côte Sauvage.
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The menhir stands on a rock called the Tombeau du Diable, which itself covers the Trou du Diable. The rock is said to be the one where Saint-Michel confronted and defeated the Devil. According to legend, a treasure was buried at its foot by a child or a salt worker after having stolen it from the Korrigans cave, on the wild coast of Pouliguen. Until the 1870s-80s, tradition dictated that young girls from the village would come to consult this menhir around August 15. Through rounds and songs around the Long Stone, they asked for their projects to come true, including marriage. If by misfortune one of the dancers touched the stone, she would not get married within the year
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Impressive dimensions. It is hidden away in a dead end street and absolutely worth seeing. In the immediate vicinity there is another dolmen, a pretty old mill and great little houses with thatched roofs.
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The Pierre Longue or Signal menhir is a menhir located in the commune of Le Croisic, in the French department of Loire-Atlantique. https://fr.m.wikipedia.org/wiki/Pierre_Longue_(Le_Croisic)
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The region offers diverse natural features, including the vast Brière Regional Natural Park, France's second-largest marshland, and a stunning coastline with over 20 beaches and coves. Key natural monuments include the Guérande Salt Marshes, known for their unique ecosystem, and Pointe de Pen-Bron, a sandy peninsula featuring the largest natural dune in the department.
Yes, the region is home to significant prehistoric sites intertwined with the natural landscape. The Tumulus of Dissignac is a vast burial site dating back 6,000 years, offering a glimpse into ancient human presence. Other notable megalithic structures include the Dolmen de la Joselière and the Menhir of La Pierre Attelée, which are also considered natural monuments.
You can enjoy a variety of outdoor activities. The Brière Regional Natural Park is ideal for exploring by foot, bike, or traditional flat-bottomed boat, with excellent birdwatching opportunities. The Saint-Nazaire coastline offers swimming, sunbathing, and watersports. For cycling enthusiasts, there are numerous routes, including gravel biking, road cycling, and MTB trails around Saint-Nazaire.
Many natural monuments are suitable for families. The Brière Regional Natural Park offers boat tours and wildlife observation, which can be engaging for all ages. The beaches along the Saint-Nazaire coastline, such as those in Saint-Marc-sur-Mer, are perfect for family outings. Urban green spaces like the Parc Paysager and Jardin des Plantes also provide peaceful retreats with playgrounds and serene lakes.
The Brière Regional Natural Park is best explored by traditional flat-bottomed boat, allowing you to navigate its intricate network of canals and floodplains. You can also explore by foot or bike on designated trails. Birdwatching, especially at dusk, is a popular activity, with observation points available at the Pierre Constant Regional Nature Reserve within the park.
The coastline around Saint-Nazaire offers breathtaking sea views. From Chemoulin Point, you can enjoy a 180° panorama from Pouliguen to Saint-Brévin. The GR®34 coastal path provides extensive walking opportunities with stunning vistas of the ocean and rugged cliffs, such as those near the Rock Arch at Pointe du Castelli.
The GR®34 coastal path, also known as the 'Customs Officers' Path,' runs along the Saint-Nazaire waterfront and is ideal for hikers, offering extensive walking opportunities with sea views. While some paths can be challenging, such as those near the Port of Bréca which can be muddy in certain seasons, many coastal trails provide enjoyable walks.
Visitors often appreciate the unique sense of calm and silence found in the Brière marshes, the diverse landscapes from wetlands to rugged coastlines, and the rich history embedded in sites like the Tumulus of Dissignac. The opportunity to witness local biodiversity and enjoy serene natural beauty is frequently highlighted.
The summer months (July and August) are ideal for visiting historical sites like the Tumulus of Dissignac, as guided tours are typically available then. For general outdoor activities and enjoying the coastline, the warmer months offer pleasant weather. Birdwatching in the Brière Regional Natural Park can be particularly rewarding at dusk.
Saint-Nazaire dedicates a significant portion of its urban space to greenery. While not always formally designated 'natural monuments,' places like the Parc Paysager (Landscape Park) and the Jardin des Plantes (Botanical Garden) offer important natural retreats. The Bois de Porcé (Porcé Wood) also provides wooded, hilly areas with shaded walks, contributing to the city's natural heritage.
While the Tumulus of Dissignac is a significant site, a guided tour is highly recommended to fully appreciate its history and context. These tours typically take place in July and August. It's advisable to book in advance to ensure access and a comprehensive experience.
The Long Stone is a notable man-made monument situated along the coast, often considered a natural monument due to its integration with the cliff and coastal landscape. It offers a blend of historical significance and natural beauty, providing a unique point of interest for visitors exploring the Saint-Nazaire coastline.


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