Best natural monuments around Haisnes offer a diverse landscape shaped by both natural processes and industrial heritage. The region features unique natural monuments, including reclaimed mining slag heaps that have transformed into significant ecological sites. These areas provide opportunities for walking, hiking, and observing diverse flora and fauna. The terrain includes artificial mountains, wetlands, and viewpoints, showcasing the area's distinct natural features.
Last updated: May 7, 2026
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Beautiful panoramic view of Lens and the surrounding area. Be careful when you climb onto the spoil heap during a storm, it's a real hair-raiser!
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The Tilleul de Joncquoy is a historic lime tree in Aubers. This tree was planted in 1490 and is an important landmark in the region. Despite the many wars and changes in the landscape, this tree has survived for more than five centuries.
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Be careful on a narrow path, in some places a slippery plastic coating covers part of the path
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Don't miss the Loos-en-Gohelle slag heap, an astonishing and unusual spectacle. There are five hills made of coal waste, and this one is the highest, reaching 146 meters, the highest in Europe! Hike to the top and admire the views. You can see how nature has transformed the hills with plants, animals and even grapes. Take the opportunity to learn about this UNESCO World Heritage site and discover its rich history and culture at Base 11/19.
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Lime tree dating from the 15th century
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Beautiful view of the mining basin and the hills of Artois on a clear day. Trail training heap.
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Beautiful slag heap accessible to the most athletic 3 switchbacks without a plateau to reach the top and admire the beautiful view of the Harnesien and the Carvinois and other summits of the slag heaps that surround it.
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The natural monuments in the Haisnes area are unique because many are former industrial sites, like coal slag heaps, that have been reclaimed by nature. These sites, such as the Loos-en-Gohelle slag heap, offer a blend of industrial heritage and ecological transformation, providing diverse landscapes for exploration and panoramic views.
Yes, the Loos-en-Gohelle slag heap is recognized as a UNESCO World Heritage site. It's notable as one of Europe's highest artificial mountains, showcasing a remarkable ecological transformation from coal waste into a thriving natural space with diverse flora and fauna.
The area around Haisnes offers a variety of outdoor activities. You can find numerous trails for gravel biking, running, and mountain biking. For example, there are routes like the 'Harnes Fishing Pond – Harnes Lagoons loop' for gravel biking, or the 'In the open fields loop' for running. You can explore more options on the Gravel biking around Haisnes, Running Trails around Haisnes, and MTB Trails around Haisnes guide pages.
Yes, the Tilleul de Joncquoy in Aubers is a family-friendly natural monument. This historic lime tree, planted in 1490, offers a peaceful and historically significant spot suitable for all ages to visit and appreciate the enduring natural heritage.
For panoramic views, you should visit the Loos-en-Gohelle slag heap, which is Europe's highest artificial mountain. Another excellent spot is View of the mining basin and the hills of Artois, which provides clear vistas of the expansive mining basin and the rolling Artois hills from its 60-meter height.
Yes, some natural monuments are dog-friendly. For instance, the View of the mining basin and the hills of Artois is noted as a dog-friendly trail, allowing you to enjoy the views with your canine companion.
If you're looking for a challenge, the Spoil heaps 74 and 74a offer a challenging climb with rewarding panoramic views from their summits. Similarly, Terril Estevelles is accessible to the more athletic, featuring three switchbacks to reach the top for beautiful views.
Many of the natural monuments, particularly the slag heaps, are remnants of the region's industrial mining past. They represent a unique blend of history and nature, showcasing how former industrial sites can transform into important ecological and historical landmarks. The Loos-en-Gohelle slag heap, for example, is a UNESCO World Heritage site that offers insights into the area's mining history and environmental rehabilitation.
While the natural monuments can be visited year-round, spring and autumn often offer pleasant temperatures for hiking and clearer views. During these seasons, the transformed landscapes are particularly vibrant with diverse flora. Winter visits can also be unique, though some paths might be slippery.
Parking availability varies by specific site. Generally, natural monuments that are popular for hiking and recreation, especially those with visitor centers or designated trailheads, will have parking facilities. It's advisable to check local information for specific parking options at each natural monument you plan to visit.
The reclaimed industrial sites, like the slag heaps, have become havens for diverse flora and fauna. As nature re-establishes itself, you might observe various bird species, insects, and small mammals. The unique ecosystems formed on these sites contribute to the region's biodiversity.


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