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France
Hauts-De-France
Valenciennes

Hergnies

Top 7 Natural Monuments around Hergnies

Best natural monuments around Hergnies offer diverse natural landscapes, characterized by wetlands, forests, and historical geological features. The region is part of the broader Scarpe-Escaut Regional Nature Park, providing a rich environment for various flora and fauna. These sites are notable for their ecological significance and provide opportunities for outdoor activities. Hergnies' natural monuments are primarily composed of marshlands and ponds, often resulting from historical mining subsidence.

Best natural monuments around Hergnies

  • The most popular natural monuments is Goriaux Pond

Last updated: May 4, 2026

Marais d'Harchies-Hensies-Pommerœul Nature Reserve

Highlight • Natural Monument

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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Goriaux Pond

Highlight • Lake

Nice spot, possibility to land, soak your feet in the water. Not far from the Arenberg gap. Accessible slag heap along the Mate in Goriaux which gives a view from …

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Rarely seen so many ornithologists together. Each with their big, long cameras!

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Les Catillons

Highlight • Natural Monument

Located in the heart of the Haine valley, between Mons and Tournai, the marshy complex of Harchies-Hensies-Pommeroeul, better known as the Marais d'Harchies, is a major site for the fauna …

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Menhir of Pierre Brunehault

Highlight • Natural Monument

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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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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Not to be missed

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

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Laurent
April 29, 2023, Mare à Goriaux

Very mobile with magnificent view of the gorial pond

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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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Rarely seen so many ornithologists together. Each with their big, long cameras!

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Willem VS
November 14, 2022, Les Catillons

Located in the heart of the Haine valley, between Mons and Tournai, the marshy complex of Harchies-Hensies-Pommeroeul, better known as the Marais d'Harchies, is a major site for the fauna and flora of Wallonia. Covering an area of 550 hectares, this site of great biological interest is home to many species and constitutes an important transit site during bird migration and offers ideal conditions for the nesting and wintering of numerous species. Its registration as a “Ramsar” wetland confirms its importance on an international scale. https://oiseaumaraisdharchies.be/

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Frequently Asked Questions

What are some of the most popular natural monuments to explore around Hergnies?

Visitors frequently enjoy the diverse natural landscapes. Among the most popular are Goriaux Pond, a significant mining subsidence pond and national biological reserve, and Étang Chabaud-Latour, known for its rich natural environment and bird species. Another highly appreciated site is the Marais d'Harchies-Hensies-Pommerœul Nature Reserve, a vast reed-covered marshland important for Wallonia's fauna and flora.

Are there family-friendly natural monuments in the Hergnies area?

Yes, several natural monuments around Hergnies are suitable for families. Goriaux Pond and Étang Chabaud-Latour are both marked as family-friendly, offering pleasant walks and opportunities to enjoy nature. The Les Catillons area, part of the larger Marais d'Harchies, also welcomes families to explore its natural beauty.

What kind of natural features can I expect to see at these monuments?

The natural monuments around Hergnies are characterized by wetlands, lakes, and historical geological features, often resulting from mining subsidence. You'll encounter expansive marshlands, such as the Marais d'Hergnies, and serene ponds like the Étang d'Amaury. These areas are rich in biodiversity, offering habitats for numerous bird species and diverse flora.

What outdoor activities can I do near the natural monuments?

The region around Hergnies is excellent for various outdoor activities. You can enjoy hiking, gravel biking, and mountain biking. For example, there are numerous hiking routes like the "Bassin d'Amaury – Étang d'Amaury loop" and several gravel biking and MTB trails that often pass by or through these natural sites. You can find more details on routes in the Hiking around Hergnies, Gravel biking around Hergnies, and MTB Trails around Hergnies guides.

Are there any historical or geological sites among the natural monuments?

Yes, the region's natural monuments often have a rich history tied to mining. Many ponds and marshlands, like Goriaux Pond, were formed by mining subsidence. Additionally, you can find the Menhir of Pierre Brunehault, an impressive megalith and one of Belgium's largest and oldest menhirs, offering a glimpse into prehistoric times.

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

The natural monuments, especially the marshlands and ponds, are particularly vibrant during spring and autumn. These seasons offer excellent birdwatching opportunities as many species use the Marais d'Hergnies as a transit and nesting site during migration. Winter can also be interesting for observing wintering birds, while summer provides pleasant conditions for walks and outdoor activities.

Are the natural monuments around Hergnies accessible for people with wheelchairs?

Some areas within the natural monuments are noted for their accessibility. For instance, the Marais d'Harchies-Hensies-Pommerœul Nature Reserve is listed as wheelchair accessible. It's advisable to check specific trail conditions for other sites, as terrain can vary.

Can I bring my dog to the natural monuments?

While specific regulations can vary by site, many natural areas in France generally allow dogs on leashes. It's always best to check local signage or official websites for each specific natural monument, such as the Marais d'Hergnies or Site Nature d'Amaury, to ensure compliance with local rules regarding pets.

Where can I find information about walking routes, especially circular ones, near Hergnies' natural monuments?

The region offers several walking routes, including circular options, that incorporate natural monuments. For example, the "Bassin d'Amaury – Étang d'Amaury loop" is a popular choice. You can explore various hiking routes, their distances, and difficulty levels in the Hiking around Hergnies guide, which often feature these natural sites.

What do visitors particularly enjoy about the natural monuments in Hergnies?

Visitors frequently highlight the tranquility and rich biodiversity of the area. Many appreciate the opportunities for birdwatching, especially at sites like the Marais d'Harchies-Hensies-Pommerœul, and the peaceful walks around ponds such as Étang Chabaud-Latour. The well-appointed areas and picturesque landscapes make them ideal for connecting with nature and photography.

Are there specific natural sites known for birdwatching in Hergnies?

Absolutely. The Marais d'Hergnies is internationally recognized as a "Ramsar" wetland and is a crucial transit, nesting, and wintering site for numerous bird species. Similarly, the Étang Chabaud-Latour is a rich natural site attracting many birds, making both excellent spots for ornithologists and nature lovers.

How long should I plan for a visit to a natural monument in Hergnies?

The duration of your visit depends on the specific site and your planned activities. For a leisurely walk around a pond like Étang Chabaud-Latour, you might spend 1-2 hours. Exploring larger marshlands or combining a visit with a longer hiking or biking route could take half a day or more. Many sites offer varying loop lengths to suit different schedules.

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