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Thumeries

Top 5 Natural Monuments around Thumeries

Natural monuments around Thumeries offer diverse landscapes, including former industrial sites transformed into natural reserves. The region features a mix of forests, wetlands, and unique geological formations like slag heaps. These areas provide opportunities for outdoor activities and observing local wildlife. Thumeries is situated in a part of France known for its ecological restoration efforts and preserved natural spaces.

Best natural monuments around Thumeries

  • The most popular natural monument is Leforest slag heap, a natural monument that offers a…

Last updated: July 2, 2026

Ostricourt slag heap

Highlight • Natural Monument

Small slag heap (n ° 120 said Fosse 6 d'Oignies Nord) with a few bumps to have fun at the start, then a long single around the Ostricourt karting. A …

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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 …

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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 …

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Rest area at Behnenwald

Highlight • Lake

Nice place, to do at sunrise / sunset to enjoy it even better!

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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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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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Difficult to drive on the site at this time because of the "luxuriant" vegetation. Access to the karting level is blocked by padlocked gates.

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Beautiful corner of nature

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Frequently Asked Questions

What are the most popular natural monuments around Thumeries?

Visitors frequently enjoy the unique landscapes of the region. Among the most popular are the Leforest slag heap, known for its challenging climb and magnificent views, and the Ostricourt slag heap, which offers trails with various bumps and single tracks. The Ladder Tree, a historical century-old oak, is also a beloved spot.

What unique natural features can I explore in Thumeries?

Thumeries is characterized by its transformed industrial landscapes, notably the slag heaps which are now natural monuments offering challenging climbs and panoramic viewpoints. You can also explore forests, wetlands, and areas dedicated to ecological restoration, such as the Site Ornithologique des Cinq Tailles, a significant bird sanctuary.

Where can I go birdwatching near Thumeries?

The **Site Ornithologique des Cinq Tailles** is the prime location for birdwatching near Thumeries. This 123-hectare nature reserve, a former industrial site, is now a haven for over 230 bird species. It features 4 kilometers of discovery trails and multiple bird observatories, making it an exceptional spot for ornithology enthusiasts.

Are there family-friendly natural monuments or trails in Thumeries?

Yes, the **Site Ornithologique des Cinq Tailles** is highly accessible, with 3 kilometers of its discovery trails suitable for people with reduced mobility, wheelchairs, and strollers. The Ladder Tree is also considered family-friendly and easily accessible by bicycle, offering a historical natural monument experience.

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

Beyond exploring the natural monuments themselves, the area around Thumeries offers various outdoor activities. You can find numerous routes for hiking, gravel biking, and road cycling. For detailed routes, you can explore the hiking guide, gravel biking guide, and road cycling guide for Thumeries.

Are there any historical natural monuments in the area?

Yes, the Ladder Tree is a remarkable century-old oak that played a role in the First World War as an observation post. Additionally, the slag heaps themselves, like the Ostricourt slag heap and Leforest slag heap, are remnants of the region's industrial past, now reclaimed by nature.

What can I expect when visiting the slag heaps around Thumeries?

The slag heaps, such as Leforest, Ostricourt, Roost-Warendin Slag Heap 138, and Terril Estevelles, offer challenging climbs and rewarding viewpoints. They often feature single tracks, some steep descents, and unique landscapes formed by birch trees. Be prepared for varied terrain, and some summits may require dismounting your bike for the final ascent on foot.

Is the Site Ornithologique des Cinq Tailles accessible for people with reduced mobility?

Yes, the Site Ornithologique des Cinq Tailles has made significant efforts to ensure accessibility. Approximately 3 kilometers of its discovery trails are designed to be accessible for people with reduced mobility, including wheelchair users and strollers. Some paths even feature braille indications.

What kind of wildlife can I see at the natural monuments?

The **Site Ornithologique des Cinq Tailles** is particularly rich in wildlife, especially birds. You can spot over 230 species, including Bluethroat, Avocet, Eurasian Bullfinch, and various marsh harriers. During spring, large numbers of laughing gulls and black-necked grebes are present. The wooded areas and wetlands also support diverse flora and fauna.

Are there any mountain biking opportunities near Thumeries' natural monuments?

Yes, the slag heaps provide excellent terrain for mountain biking, with features like bumps, single tracks, and challenging climbs. For example, the Roost-Warendin Slag Heap 138 is described as a 'beautiful mountain bike playground'. Additionally, a new mountain bike circuit has been developed near the Site Ornithologique des Cinq Tailles.

What makes the natural monuments around Thumeries ecologically significant?

Many natural monuments in the area, particularly the **Site Ornithologique des Cinq Tailles**, are significant examples of ecological restoration. This site, once an industrial settling pond, has been successfully transformed into a thriving nature reserve and is recognized as a Natura 2000 site for its European ecological importance in bird protection. The slag heaps also represent successful reconversion of industrial land into natural spaces.

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

CominesDeûlémontWervicq-SudWarnetonSeclinLa NeuvilleOstricourtAvelinTourmigniesMérigniesMoncheauxMons-En-PévèleChemyAttichesPhalempinGondecourtBerséeAnnœullinLeersCamphin-En-CarembaultCamphin-En-PévèleBaisieuxTressinVilleneuve-D'AscqSainghin-En-MélantoisAnstaingForest-Sur-MarqueCarninAllennes-Les-MaraisProvinQuesnoy-Sur-DeûleTourcoingTempleuve-En-PévèleHouplinesFrelinghienSailly-Lez-LannoyChérengToufflersBouvinesWillemsCysoingWannehainBourghellesGrusonWattrelosArmentières

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