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France
Hauts-De-France
Douai

Lallaing

Top 4 Natural Monuments around Lallaing

Best natural monuments around Lallaing are shaped by a mix of historical natural features and reclaimed industrial landscapes. The Scarpe River is a defining natural element, intrinsically linked to the town's historical development and offering a riparian environment. Historically, Lallaing also featured a natural mound, which served as the foundation for a feudal castle. The wider region around Lallaing includes several regional natural reserves, preserving diverse ecosystems like peat bogs and marshlands.

Best natural monuments around Lallaing

  • The most popular natural monument is Leforest slag heap, a natural monument that offers a viewpoint after a climb. It is known for its technical ascent and descent, providing views from the summit.
  • Another must-see spot is Terril des Argales, a natural monument with a layout around an ornithological reserve pond. Visitors can find different promontories that offer an unobstructed view of the region.
  • Visitors also love Ladder Tree, a forest and historical site. This remarkable century-old oak is notable for its historical significance during the First World War, having been used as an observation post.
  • Lallaing is known for its reclaimed slag heaps and historical natural features. These sites offer a variety of natural monuments to see and explore, from elevated viewpoints to significant historical trees.
  • The natural monuments around Lallaing are appreciated by the komoot community, with over 130 upvotes and 28 photos shared.

Last updated: August 25, 2026

Leforest slag heap

Highlight • Natural Monument

Small heap around which we will quickly go around. To climb it, favor the climb from the right, because the final descent is very steep and impossible to do in the other direction. Please note, it is a bit technical but doable if you have a good understanding of your mount (or go down by the side by which you are mounted). The summit is inaccessible by mountain bike and will therefore only be done on foot. A nice little point of view will await you.

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Ladder Tree

Highlight • Forest

Remarkable century-old oak, having participated in the history of the First World War.
It is easily accessible by bicycle.
Which is not the path that goes deep into the forest.

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Roost-Warendin Slag Heap 138

Highlight • Natural Monument

Small heap located near the College of Roost-Warendin. It is less known than its neighbor of the Paturelles (bigger and more fun), but it deserves a trip if you are in the area. You will find lots of little singles forming a real labyrinth in the middle of birch trees (with passages sometimes very narrow). Don't hesitate to get lost ... without forgetting a very steep little climb for the more athletic!

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Terril 125 of Sainte-Marie

Highlight • Natural Monument

A small part is accessible by bicycle but you will have to cross a few rocks which prevent motor vehicles from venturing there.

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Germignies Marsh and Spoil Heap

Highlight • Natural

You can enjoy this site composed of several natural and artificial ponds. It is a rich natural environment with a birch forest. There are many rare plant species and the European nightjar frequents the site during the nesting period.

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Popular around Lallaing

Cycling around Lallaing

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Tips from the Community

Jean Pierre
April 20, 2025, Terril 138 de Roost-Warendin

beautiful mountain bike playground

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This oak, 200 to 300 years old, would have been used by the German army during the First World War as an observation post. The panel states: "The soldiers could thus observe the artillery and enemy movements. We can still observe some of the iron bars which would have been inserted into the trunk in order to constitute a ladder. The tree having continued to grow, the majority of the bars have been absorbed by the bark."

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You can enjoy this site composed of several natural and artificial ponds. It is a rich natural environment with a birch forest. There are many rare plant species and the European nightjar frequents the site during the nesting period.

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You can enjoy this site composed of several natural and artificial ponds. It is a rich natural environment with a birch forest. There are many rare plant species and the European nightjar frequents the site during the nesting period.

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Max
March 26, 2023, Arbre à Échelles

Remarkable century-old oak, having participated in the history of the First World War. It is easily accessible by bicycle. Which is not the path that goes deep into the forest.

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good descent followed by fast single

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Mandatory and iconic stopover in the region

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Pierre B
October 28, 2021, Terril de Leforest

Nice place typical of the North. Difficult in gravel in wet weather.

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Frequently Asked Questions

What unique natural features can I explore directly within Lallaing?

Lallaing's natural landscape is significantly shaped by the Scarpe River, a canalized waterway that has been central to the town's history. You can enjoy strolls along its banks, appreciating the riparian environment. Historically, Lallaing also featured a "motte naturelle," a natural mound that served as the foundation for a feudal castle, highlighting a significant natural aspect of the commune's past.

Which natural monuments offer the best viewpoints around Lallaing?

For panoramic views, consider visiting the Leforest slag heap. It offers a magnificent vista after a climb, though the ascent and descent can be technical. Another excellent option is Terril des Argales, which provides unobstructed views of the region from various promontories around its ornithological reserve pond.

Are there any family-friendly natural monuments or sites with historical significance?

Yes, the Ladder Tree is a remarkable century-old oak that is both family-friendly and historically significant. It was used as an observation post during the First World War, and you can still see remnants of the iron bars that formed a ladder in its trunk. It's easily accessible and offers a unique blend of nature and history.

What kind of outdoor activities can I do near the natural monuments around Lallaing?

The area around Lallaing is excellent for various outdoor activities, especially cycling. You can find numerous routes for gravel biking, road cycling, and touring. For example, the "Towpath of the Scarpe" offers scenic rides. Explore more options in the Gravel biking around Lallaing, Road Cycling Routes around Lallaing, and Cycling around Lallaing guides.

Are there opportunities for mountain biking at the natural monuments?

Absolutely. The Roost-Warendin Slag Heap 138 is known as a great mountain bike playground, featuring lots of small singles that form a labyrinth among birch trees. It also has a very steep climb for more athletic riders. The Leforest slag heap also offers technical ascents and descents popular with mountain bikers.

What are some notable natural reserves near Lallaing for nature observation?

While not directly in Lallaing, several significant regional natural reserves are a short drive away. These include the Réserve naturelle régionale de la Tourbière de Vred (5km), likely preserving a peat bog ecosystem; the Réserve naturelle régionale du Marais de Wagnonville (7km), offering diverse wetland habitats; and the Réserve naturelle régionale du Pré des Nonnettes (7km), which probably protects important grassland or meadow ecosystems. These are excellent for wildlife observation and experiencing regional biodiversity.

What do visitors particularly enjoy about the natural monuments around Lallaing?

Visitors frequently highlight the rewarding views from the slag heaps, such as the Leforest slag heap, which offers a magnificent panorama. The unique mountain biking opportunities and labyrinthine trails at sites like Roost-Warendin Slag Heap 138 are also highly appreciated. The historical significance of the Ladder Tree also makes it a memorable stop.

Is it possible to access the natural monuments by bicycle?

Many natural monuments and surrounding areas are very accessible by bicycle. The Ladder Tree is easily reached by bike. For Terril 125 of Sainte-Marie, a small part is accessible by bicycle, though you might need to navigate some rocks. The region's extensive network of cycling routes, including the "Towpath of the Scarpe," also connects to many natural sites.

What should I know about visiting the slag heaps, such as Terril des Argales?

When visiting slag heaps like Terril des Argales, be aware that while they offer great views and trails, some, like Argales, have experienced internal combustion, leading to gases and smoke escaping occasionally. Always follow local signage and safety guidelines. For the Leforest slag heap, the climb can be technical, so choose your path carefully, especially if you're not on foot.

Are there any natural monuments that are less known but still worth visiting?

Yes, Terril 125 of Sainte-Marie is a smaller slag heap that offers a unique experience. While a small part is accessible by bicycle, you'll encounter rocks that prevent motor vehicles, making it a quieter spot. It's a good option for those looking for a less crowded natural monument with trails to explore.

What is the best way to explore the Scarpe River near Lallaing?

The best way to explore the Scarpe River is by taking the "Au fil de la Scarpe" riverside walk. This 8-kilometer path connects Douai to Lallaing and allows you to experience the river's right bank, its natural environment, and the local riparian ecosystem. It's perfect for a leisurely stroll or a bike ride.

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Extend your search for the best caves by checking out these guides of the top ones around Lallaing:

EsquerchinSin-Le-NobleFaumontFlers-En-EscrebieuxCantinAuchy-Lez-OrchiesRaimbeaucourtRoost-WarendinAubyRoucourtDechyWaziersCoutichesFlines-Lez-RachesLambres-Lez-DouaiCuincyGœulzinLauwin-PlanqueWandignies-HamageFenainErreHornaingMonchecourtGuesnainLewardeErchinVillers-Au-TertreRâchesAnhiersÉcaillonMasnyCourchelettesFérinArleuxFressainFéchainBugnicourtBrunémontAubigny-Au-BacMarchiennesMarcq-En-OstreventPecquencourtAnicheAuberchicourtLoffreEstréesLécluseHamel

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