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Belœil

Top 11 Natural Monuments around Belœil

Natural monuments around Belœil offer diverse natural landscapes and recreational opportunities. The region is characterized by its proximity to the Richelieu River and features protected areas with varied ecosystems. Visitors can explore a range of natural sites, from restored urban parks to significant nature reserves. These locations provide settings for outdoor activities and observing local biodiversity.

Best natural monuments around Belœil

  • The most popular natural monuments is Marais d'Harchies-Hensies-Pommerœul Nature Reserve, a natural monument with viewpoints and lakes. This site is known for being the largest reed-covered area in Wallonia, hosting over 300 animal species.
  • Another must-see spot is Mer de Sable State Reserve, a unique natural monument featuring peat moors and young birch forests. The reserve is a protected area recognized for its exceptional flora, including heather and carnivorous plants.
  • Visitors also love The bubbling spring of Stambruges and its mysteries., a natural monument located within a forest. This spring is notable for its constantly agitated water surface, caused by air crossing a sandy layer.
  • Belœil is known for its natural monuments, including forests, lakes, and viewpoints. The area offers a variety of natural monuments to see and explore, catering to different interests.
  • The natural monuments around Belœil are appreciated by the komoot community, with more than 160 upvotes and 50 photos shared.

Last updated: August 8, 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, 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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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 water. This is how the ponds we can still see today were formed. The fact that mining was once practiced is still visible in the many mine heaps. These very dry and warm environments are home to a special flora and fauna. However, the greatest interest of the 'Marais d'Harchies-Hensies-Pommeroeul' lies in the wetlands. The ponds and their bankside vegetation cover a large area.Museum description: A magnificent natural area The marshes are the largest reed-covered area in Wallonia (more than 50 hectares). The number of animal species is not that great, but they are rare and some are even threatened with extinction. More than 300 species have already been observed there and about 100 of them have bred there at least once. Some species have not been observed in recent years, but others have recently settled there.

Source: visitwapi.be/nl/moeras-van-harchies

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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. Quite quickly, you will find a marked path on your left, heading east. It is at the level of a small bridge that you then discover this source whose surface of the water is constantly agitated with fine bubbles. It’s not the heat of the water, a bit hotter than it should be, that is causing this incessant bubbling. It is in fact the air which, thanks to a fault, crosses the sandy layer at the bottom of the source.
The legend of the sunken coach


the boiling fountain of Stambruges hides the legend of the sunken coach. This unusual phenomenon has fueled a tragic legend linked to the place. In fact, it is said that in the past, one of the princes of the house of Ligne, to which Beloeil castle belongs, not far from here, was nicknamed the great devil. A nickname due to his reputation as an unrepentant gallant. He invited a young lady to spend a romantic evening on Good Friday. The unfortunate woman never returned to her home ... Coach, horses, coachman and young girl disappeared body and well in the waters of the spring. Nobody knew that she was the cause of the accident… divine punishment or jealousy… Some murmured that the mad coachman in love with his mistress could not bear that she gave herself thus to this prince so depraved… He then rushed all his crew in the dark waters, reputed to engulf forever objects and living beings trapped in the sands that sleep at the bottom ... This is how since midnight, every Good Friday, it is said that the coach reappears for a short time. We then hear the driver cracking his whip ... Before he dives again until the following year ...

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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 2009. However, we continue to drive nails into it and leave personal objects, toys, clothes, shoes, bandages... These are the famous "rags" that we also find hanging to chapels, calvaries, springs in the region… The second, a younger oak, its “replacement” is right next door. Some “rags” also hang from the trunk to end up on the ground, a sign of healing according to tradition. But obviously, the old locust tree, even dead, still largely retains the votes of pilgrims.

You will notice the nails embedded in the bark. The rag trees of Stambruges would in fact be related to the tradition of nail trees, a tradition formerly common in northern France and Belgium. Originally, we just drove a nail into the tree, the menhir or the statue... By reciting a prayer or making a wish. Easier to deposit, more personal, rags have gradually taken over.

The rag trees of Stambruges are both invoked for the healing of skin diseases, rheumatism, childhood illnesses, to make it easier for babies to walk or the healing of wounds... We do not know when this belief dates back. On the other hand, when we look at the photos taken at the beginning of the 20th century, the locust tree, to the right of the chapel, does not yet seem to be covered in rags.

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The Harchies Marshes, located in Wallonia, have a rich and eventful history. In the 18th century, the Haine Valley was bordered by wet and marshy meadows, but no body of water existed. Between 1925 and 1930, mining caused subsidence, creating depressions invaded by the water table. In the 1950s, the surface area covered by water increased, promoting exceptional biodiversity. Between 1968 and 1971, the site drained, threatening its ecosystem. From 1973-1974, preservation efforts allowed the marsh to revive. In 1986, the site was recognized as a Ramsar area, highlighting its ecological importance. Today, it covers approximately 550 hectares and is classified as a Special Protection Area. It is home to a wide variety of habitats and more than 250 bird species. It remains a popular birdwatching site for birdwatchers and nature lovers.

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Tips from the Community

Frederic Merchet
April 25, 2026, Marais d'Harchies-Hensies-Pommerœul Nature Reserve

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

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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 Harchies Marshes, located in Wallonia, have a rich and eventful history. In the 18th century, the Haine Valley was bordered by wet and marshy meadows, but no body of water existed. Between 1925 and 1930, mining caused subsidence, creating depressions invaded by the water table. In the 1950s, the surface area covered by water increased, promoting exceptional biodiversity. Between 1968 and 1971, the site drained, threatening its ecosystem. From 1973-1974, preservation efforts allowed the marsh to revive. In 1986, the site was recognized as a Ramsar area, highlighting its ecological importance. Today, it covers approximately 550 hectares and is classified as a Special Protection Area. It is home to a wide variety of habitats and more than 250 bird species. It remains a popular birdwatching site for birdwatchers and nature lovers.

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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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Special, that sandy area and a nice place to eat (there is also a restaurant)

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There are two viewing huts on the route. But especially many ornithologists. This must clearly be a special place!

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In the forest of Stambruges is 'la Fontaine bouillante', the bubbling spring where, according to legend, a mistress of the Prince De Ligne drowned with her coach and the crew of the coach tries to surface. In reality, it is spring water bubbling up through a crack in the earth. https://nl.wikipedia.org/wiki/Bos_van_Stambruges

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Frequently Asked Questions

What unique natural features can I explore around Belœil?

Belœil offers a variety of unique natural features. You can visit the Mer de Sable State Reserve, known for its rare peat moors and young birch forests, home to exceptional flora like heather and carnivorous plants. Another intriguing spot is The bubbling spring of Stambruges and its mysteries., where water constantly agitates due to air crossing a sandy layer, surrounded by a forest.

Are there any natural monuments suitable for wildlife observation?

Yes, the Marais d'Harchies-Hensies-Pommerœul Nature Reserve is an excellent choice for wildlife observation. It's the largest reed-covered area in Wallonia, hosting over 300 animal species, with about 100 species breeding there. There are also viewing huts along the route, making it a prime spot for ornithologists.

What are the best places for hiking near Belœil?

For hiking, the Mer de Sable State Reserve offers marked trails through its unique landscape. Additionally, while technically across the Richelieu River, the Mont Saint-Hilaire Nature Reserve (Gault Nature Reserve) is a prominent landmark associated with the area, offering diverse trails through old-growth forests and rocky cliffs with panoramic viewpoints. For more options, you can explore various MTB Trails around Belœil, which often include hiking paths.

Are there family-friendly natural monuments in the area?

Yes, the The Nail Tree of Stambruges is considered family-friendly, offering a unique cultural and natural experience. The Parc naturel des Trente-Arpents in Belœil also provides an accessible urban green space with walking trails suitable for families.

Can I find wheelchair-accessible natural sites around Belœil?

The Marais d'Harchies-Hensies-Pommerœul Nature Reserve is noted for being wheelchair accessible, allowing visitors to enjoy its extensive reed beds and observe diverse birdlife.

What kind of outdoor activities can I do near these natural monuments?

Beyond hiking, you can enjoy various outdoor activities. The Terril Saint-Antoine is known as an MTB park, offering challenging terrain for mountain biking. The Richelieu River, bordering Belœil, provides opportunities for boating and waterside activities. For cycling enthusiasts, there are numerous Road Cycling Routes around Belœil and Gravel biking routes in the region.

Are there any natural monuments with historical or cultural significance?

Yes, The Nail Tree of Stambruges holds significant historical and cultural value. It's a traditional 'rag tree' where people drive nails and leave objects, symbolizing wishes for healing, particularly for skin diseases and childhood ailments. It's also associated with a chapel and local legends.

What is the best time of year to visit the natural monuments around Belœil?

The natural monuments around Belœil can be enjoyed year-round, but spring and autumn offer particularly pleasant conditions for outdoor activities with milder temperatures and beautiful scenery. The Parc naturel des Trente-Arpents is accessible year-round. For specific seasonal changes or winter access, it's advisable to check local conditions, especially for trails in reserves like Mont Saint-Hilaire.

Are dogs allowed on trails near Belœil's natural monuments?

The Parc naturel des Trente-Arpents in Belœil is dog-friendly, making it a great option for walks with your canine companion. For other natural monuments, it's always best to check specific regulations for each site regarding dog access and leash requirements.

Where can I find panoramic views of the region?

For panoramic views, the Mont Saint-Hilaire Nature Reserve, a prominent landmark visible from Belœil, offers stunning vistas from its rocky cliffs and viewpoints. Additionally, the Terril Saint-Antoine, a former slag heap, also provides elevated viewpoints of the surrounding landscape.

Are there any natural monuments that are considered 'hidden gems'?

While not strictly 'hidden,' the bubbling spring of Stambruges offers a unique and somewhat mysterious experience within a forest setting, making it a less conventional but fascinating natural monument to discover.

What amenities are available near the natural monuments?

The Parc naturel des Trente-Arpents offers a rest area and a dock for small non-motorized boats. For other sites, amenities vary. The Mer de Sable State Reserve has a restaurant nearby. For broader amenities like cafes and accommodation, you might need to venture into nearby towns or check local tourism resources such as Tourisme Montérégie.

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