Natural monuments around Nieurlet are found within the Audomarois marshland in northern France, offering diverse natural sites. The area features former clay extraction sites and peatlands that have been reclaimed by nature, evolving into rich wetlands. Notable locations include L'Argilière de l'Aa and the Réserve Naturelle Nationale des Étangs du Romelaëre, which encompasses the Étangs de Booneghem. These sites provide opportunities for observing varied flora and fauna in a unique marshland environment.
Last updated: July 2, 2026
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Nice, here you can compare the photo with the current situation. 13th century: stone sculptor; 1600: moving with the pole (flat bottom/punter) 1700: dredging with a dredging net 1850: drainage mill 1900: fishing with bundle of branches 1920: harrowing and rolling
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The Réservé Naturelle Nationale des Étangs du Romelaëre is a beautiful nature reserve located in Clairmarais, Saint-Omer and Nieurlet. This reserve, which covers approximately 108 hectares, is a remnant of an old peat cutting from the 19th century. The area consists of ponds, canals, bridges and chain pits, and offers a rich diversity of flora and fauna.
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Magnificent lake in the middle of the forest, ideal for starting a walk around the lake or a hike through the forest
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Nieurlet is situated within the Audomarois marshland, offering diverse natural features. You can explore former clay extraction sites like L'Argilière de l'Aa, which has transformed into a wetland with rare plants. The region also features extensive peatlands, now rich wetlands, such as the Romelaëre Nature Reserve Circuit, characterized by ponds, canals, and bridges.
Yes, several natural monuments in the Nieurlet area are suitable for families. The Romelaëre Nature Reserve Circuit is considered family-friendly, offering easy paths to observe flora and fauna. The Saint-Omer Public Garden also provides a pleasant environment for all ages with its varied landscape styles. Additionally, Harchelle Lake is ideal for family walks around the water or through the surrounding forest.
The region blends natural beauty with historical significance. For instance, the Bomb Crater in Parc Naturel Régional des Caps et Marais d'Opale is a natural monument featuring a relic of the Second World War, with hiking trails around a V2 bunker. Another site, 14 centuries of hard work, showcases the historical evolution of human interaction with the marshland, from stone sculptors to traditional dredging methods.
The Nieurlet area offers various outdoor activities. You can enjoy hiking, cycling, and gravel biking. For hiking, explore routes like 'Le marais audomaroiss' or 'From one bank to the other – Ferry crossing loop from Clairmarais'. Cyclists can find routes such as 'Boat Lift of Fontinettes – Chestnut tree bridge loop from Clairmarais'. For more details on routes, visit the Hiking around Nieurlet, Cycling around Nieurlet, or Gravel biking around Nieurlet guides.
The Réserve Naturelle Nationale des Étangs du Romelaëre, which includes the Étangs de Booneghem, is an excellent spot for wildlife observation. This wetland is home to diverse birdlife such as cormorants, herons, little bitterns, and marsh harriers. Specially designed walking paths facilitate peaceful observation. L'Argilière de l'Aa also hosts rare plants and is grazed by sheep, adding to its natural charm.
Yes, the Audomarois marshland offers accessible paths. The Étangs de Booneghem, part of the Réserve Naturelle Nationale des Étangs du Romelaëre, features walking paths designed to be accessible to all. The Romelaëre Nature Reserve Circuit is generally considered an easy trail, perfect for a leisurely stroll to enjoy the natural surroundings.
The natural monuments in Nieurlet, particularly the marshlands, can be enjoyed year-round. However, spring and autumn often offer pleasant temperatures for walking and optimal conditions for birdwatching as migratory species pass through. L'Argilière de l'Aa is open all year, allowing visitors to experience the changing seasons.
While many natural areas in France are dog-friendly, it's always best to check specific regulations for nature reserves to ensure the protection of local wildlife. Generally, dogs on a leash are permitted on public paths, but access might be restricted in sensitive ecological zones like the core areas of the Réserve Naturelle Nationale des Étangs du Romelaëre. Always look for signage at the entrance of each site.
The duration of your visit depends on the sites you choose. For a comprehensive experience of the Romelaëre Nature Reserve Circuit, you might spend a few hours exploring its paths and observing wildlife. Shorter walks around Harchelle Lake or L'Argilière de l'Aa could take 1-2 hours. If you plan to combine multiple sites or engage in longer hikes, a full day might be needed.
Yes, a unique feature of exploring the Audomarois marsh is the traditional chain ferry, known as a 'bac,' used to cross the river. This offers a glimpse into the traditional transportation methods of the area and can be an enjoyable part of your visit to sites like the Étangs de Booneghem.
Nieurlet and nearby towns like Saint-Omer offer various amenities. While specific cafes might not be directly adjacent to every natural monument, you'll find options in the commune centers. For example, the Saint-Omer Public Garden is located in Saint-Omer, where you can easily find cafes and restaurants. It's advisable to plan your visits to natural sites around these towns for convenience.


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