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Plaines De L'Escaut Natural Park

Top 8 Natural Monuments in Plaines De L'Escaut Natural Park

Best natural monuments in Plaines De L'Escaut Natural Park are found within a verdant expanse of forests and wetlands, situated near the Franco-Belgian border. This region, part of the larger Hainaut Cross-Border Natural Park, offers diverse ecosystems from peat moors to extensive woodlands. The park's varied natural landscape supports a wide array of plant and animal life, including rare species. Unique geological and historical contexts, such as wetlands formed by mining subsidence, add to the area's distinct character.

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Last updated: October 1, 2026

Mer de Sable State Reserve

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The Mer de Sable nature reserve is a 22-hectare protected area, renowned for its peat moors and young birch forests. Formerly a pond that dried up in the 19th century, …

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Like most of the wetlands in the Haine valley, the Harchies-Hensies-Pommeroeul marshes were formed in subsidence caused by mining. The depressions were formed in the mid-1920s and immediately filled with …

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The closest access to the boiling fountain is from the Hameau des Ecacheries side. At the end of rue du Bosquet, take the dirt road that goes into the forest. …

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The Nail Tree of Stambruges

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The two rag trees of Stambruges

There are now two of them carrying the wishes and hopes of recovery. The oldest, a black locust tree, fell to the ground in …

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Menhir of Pierre Brunehault

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The Pierre Brunehault, located in Brunehaut near Tournai, is an impressive megalith and one of the largest and oldest menhirs in Belgium. This mysterious stone, over four metres high, dates …

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Katrien
July 30, 2026, Menhir de Pierre Brunehault

A well-known additional legend tells that Queen Brunhilde of Austrasia lost the gigantic stone when she fled via the Roman road. The devil was so close on her heels that her horse stumbled, after which the monolith remained stuck in the ground as a memorial. Another tradition claims that the menhir is anchored with an invisible golden chain to the riverbed of the nearby Scheldt.

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The Pierre Brunehaut in Hollain is the largest prehistoric menhir in Belgium. This gigantic monolith weighs over twenty-three tons and dates back to the late Stone Age. The sandstone stands on an open field near a historic Roman road. Surrounded by four striking poplars, the monument has been the setting for mysterious local legends for centuries.

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Attention change of regulation, a part of the reserve is forbidden to bicycles. I saw it this morning.

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Not to be missed

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Michel Raulier: The Nail Tree of Stambruges Tree worship in our region is very ancient. Proof of this is the discovery in Blicquy, in the place called "Ville d'Anderlecht," of a set of 120 posts up to 90 cm in diameter. These may have served as supports for offerings, as evidenced by the numerous iron pins found in the filling holes. This could correspond to an artificial sacred grove housing deities, similar to Lucan's description of petrified forests in Pharsalia. In the past, trees, with their longevity and majestic shape, aroused a sense of sacredness in the minds of our ancestors. They were also believed to be capable of helping people solve their problems, particularly health problems. Many customs exist: walking around the tree, driving nails to fix the ailment, and tying cloths or fabrics to bind it. These trees were often Christianized by the installation of religious images or a chapel nearby. One example among others is that of Notre Dame de Foy. In Foy, near Dinant, a woodcutter discovered a 15th-century statuette in the heart of a very ancient oak tree in 1609. Long forgotten, the figurine bearing the image of the Virgin had been placed in a niche carved into the trunk. Over time, the wood completely covered it and erased its memory. In Stambruges, there is one of these remarkable trees, and beside it is a chapel, called "the chapel of Erconpuch" or, by another name, "the chapel of Arc-au-Puche," dedicated to the Virgin Our Lady of Arc-au-Puits, formerly called the Virgin of the Woods.

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The Pierre Brunehault, located in Brunehaut near Tournai, is an impressive megalith and one of the largest and oldest menhirs in Belgium. This mysterious stone, over four metres high, dates back to prehistoric times and has been the subject of stories and legends about its origins and meaning for centuries.

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The Mer de Sable nature reserve is a 22-hectare protected area, renowned for its peat moors and young birch forests. Formerly a pond that dried up in the 19th century, the site is home to exceptional flora, including heather and carnivorous plants such as the sundew. The reserve, classified as a major heritage site in Wallonia, offers marked trails for hiking and observing local biodiversity.

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Ornithological nature reserve, with magnificent species. Several observation points set up for bird watching. accessible to PMR.

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Frequently Asked Questions

What are the most popular natural monuments in Plaines De L'Escaut Natural Park?

Among the most appreciated natural monuments are the Marais d'Harchies-Hensies-Pommerœul Nature Reserve, known for its significant ornithological value and wetlands, and the Mer de Sable State Reserve, which features unique peat moors and rare carnivorous plants. Visitors also find the mysterious bubbling spring of Stambruges particularly intriguing.

What unique natural features can I expect to see in Plaines De L'Escaut Natural Park?

The park offers a diverse range of natural features. You can explore unique peat moors and sandy areas with rare flora like heather and carnivorous plants at the Mer de Sable State Reserve. The Marais d'Harchies-Hensies-Pommerœul Nature Reserve showcases extensive wetlands, which are vital for numerous bird species. Additionally, the park is home to vast deciduous forests, including the Bon Secours forest, and features unique phenomena like the bubbling spring of Stambruges.

Are there family-friendly natural monuments in Plaines De L'Escaut Natural Park?

Yes, several natural monuments are suitable for families. The Mer de Sable State Reserve offers marked trails that are easy to explore. The Nail Tree of Stambruges is a fascinating cultural and natural site that can spark children's curiosity. The 'Escale forestière' in Bon-Secours also provides an elevated walkway, the 'Promenoir des Cimes,' which is a fun and educational experience for all ages.

What is the best time to visit the natural monuments in Plaines De L'Escaut Natural Park?

The park's natural monuments offer beauty throughout the year. Spring and summer are ideal for observing the diverse flora, including heather and carnivorous plants, and for birdwatching at sites like the Marais d'Harchies. Autumn provides stunning foliage in the extensive forests. Even winter can be rewarding for quiet walks and spotting wildlife, though some facilities might have reduced hours.

Are there any historical or cultural sites associated with the natural monuments?

Yes, the natural monuments often have interesting historical contexts. The Marais d'Harchies, for example, were formed in depressions caused by mining subsidence in the 1920s. The Nail Tree of Stambruges is a unique cultural site linked to ancient traditions of healing and wishes. The bubbling spring of Stambruges also carries a local legend of a sunken coach.

What outdoor activities can I do near the natural monuments in Plaines De L'Escaut Natural Park?

The park is excellent for various outdoor activities. You can find numerous hiking trails, including easy options like the 'Grand Large Loop' or the 'Circuit de l'Arbre à clous'. For cycling enthusiasts, there are routes like the 'RAVeL W4: Canals, Streams and Rivers Trail'. Mountain biking is also popular, with trails such as the 'Stambruges MTB Playground – Beloeil Castle loop'. You can explore more options on the hiking guide, cycling guide, and MTB guide for the region.

Are there hiking trails suitable for different difficulty levels near these natural monuments?

Yes, the Plaines De L'Escaut Natural Park offers hiking trails for various skill levels. You can find easy walks like the 'Grand Large Loop' (6.9 km) or the 'Circuit de l'Arbre à clous' (5.6 km). For those seeking a bit more challenge, there are moderate routes such as the 'Les Catillons – Hunting Avenue loop from Harchies' (12.7 km). Explore more options in the hiking guide for Plaines De L'Escaut Natural Park.

Can I go cycling or mountain biking near the natural monuments?

Absolutely. The park provides excellent opportunities for both cycling and mountain biking. Road cyclists can enjoy routes like the 'RAVeL W4: Canals, Streams and Rivers Trail' (57.7 km, moderate). Mountain bikers have options such as the 'Stambruges MTB Playground – Beloeil Castle loop' (50.7 km, moderate). For more detailed routes, refer to the cycling guide and MTB guide for the region.

Are the natural monuments in Plaines De L'Escaut Natural Park accessible for wheelchairs?

Some areas within the natural monuments are designed to be wheelchair accessible. For instance, the Marais d'Harchies-Hensies-Pommerœul Nature Reserve is noted for its accessibility, offering observation points that can be reached by wheelchair. It's always advisable to check specific site information for detailed accessibility features before your visit.

Where can I find information or visitor centers in the park?

For practical information, maps, and details about events, you can visit the 'Maison du Parc Naturel'. Additionally, 'L'Escale forestière' in Bon-Secours serves as a visitor center, providing insights into the forest's life and offering unique experiences like its elevated walkway.

What do visitors particularly enjoy about the natural monuments in Plaines De L'Escaut Natural Park?

Visitors frequently highlight the rich biodiversity, especially the exceptional flora at sites like the Mer de Sable State Reserve, which includes carnivorous plants. The Marais d'Harchies is highly praised by ornithologists for its birdwatching opportunities. The unique geological and historical context, such as wetlands formed by mining activities, also adds an interesting dimension to the natural beauty. The marked trails and observation points make exploration enjoyable for all.

What makes the Mer de Sable State Reserve unique?

The Mer de Sable State Reserve is a 22-hectare protected area distinguished by its peat moors and young birch forests. It's home to exceptional flora, including heather and rare carnivorous plants like the sundew. This site, once a pond that dried up, is classified as a major heritage site in Wallonia and offers marked trails to explore its rich biodiversity.

What is special about the Marais d'Harchies-Hensies-Pommerœul Nature Reserve?

The Marais d'Harchies-Hensies-Pommerœul Nature Reserve is a significant ornithological site in Wallonia, often considered one of the best. These wetlands were formed in depressions caused by mining subsidence in the 1920s, which subsequently filled with water. The reserve is highly valued for its diverse flora and fauna, particularly its extensive reed beds, and features several observation points perfect for bird watching.

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Extend your search for the best caves by checking out these guides of the top ones in Plaines De L'Escaut Natural Park:

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