Natural monuments around Houdain showcase the diverse landscapes of the Pas-de-Calais department in France. The region features a blend of natural formations and sites where industrial heritage has been reclaimed by nature, offering varied recreational opportunities. These areas highlight the local ecological evolution and historical significance. Visitors can explore unique geological features and transformed industrial landscapes.
Last updated: May 7, 2026
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Former site of Fosse 14 - Stabilized path.
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Also known as "terril de la cuisse maraine" (the slag heap of the thigh maraine), a slag heap where nature has reclaimed its rights, dotted with small paths.
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it's written like that on the sign
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legend of the fairies who dance around the dolmen
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Carreau Valley redeveloped to highlight the mining heritage. The paths that were once dirt are now gravel, ideal for walking or cycling. Don't hesitate to go up to the terriloscope. By putting your eye at the level of the holes provided for this purpose you will see what the height of the slag heaps was in their heyday. This allows you to see the effects of time.
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This site is part of the unknown treasures of the Land of Artois. The various megalithic sites are good for a beautiful walk, among mysteries and legends, history and extraordinary landscapes
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This lake is an old quarry with a depth of 3 to 11 meters and an area of 2 hectares. Here you can fish for carp, trout, pike and other species, or simply relax on the shore and admire the view.
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A must see if you are in the area.
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The Houdain area offers a blend of natural formations and sites where industrial heritage has been reclaimed by nature. You can explore ancient megalithic sites like the Passage dolmen: The Fairy Table, tranquil water bodies such as Lac de Beugin, and the distinctive terrils (slag heaps) that have transformed into biodiverse ecosystems, like Terril 36 of Nœux-les-Mines and Terril de Fouqureuil.
Yes, the region is rich in sites that blend natural beauty with historical significance. The most prominent is the Passage dolmen: The Fairy Table, a megalithic complex over 4000 years old, which is the sole survivor of a gigantic ancient site. Additionally, Vallée Carreau Park is a redeveloped site that highlights the region's mining heritage, offering insights into its industrial past.
The natural monuments and surrounding areas provide numerous opportunities for outdoor activities. You can enjoy hiking and walking on stabilized paths at Vallée Carreau Park or explore the trails on the terrils. The region is also excellent for cycling and mountain biking, with various routes available. For instance, you can find routes for gravel biking, cycling, and MTB trails around Houdain.
Absolutely. Vallée Carreau Park is particularly suitable for families, with stabilized paths ideal for walking or cycling. Lac de Beugin also offers a tranquil setting for relaxation by the water, which can be enjoyable for all ages.
Many of the terrils offer elevated positions with excellent viewpoints. For example, Terril 36 of Nœux-les-Mines provides a beautiful view, including a ski slope. Vallée Carreau Park features a 'terriloscope' where you can glimpse the former height of the slag heaps and the surrounding landscape. The Parc d'Olhain, nearby, also boasts a belvedere with 360-degree views.
The 'terrils' are artificial hills, remnants of the region's coal mining history, essentially mounds of mining waste. They are significant natural monuments because nature has remarkably reclaimed them, transforming them into biodiverse ecosystems with unique landscapes. They showcase ecological succession and the resilience of nature, offering both ecological interest and recreational value.
While specific seasonal recommendations aren't provided, the natural monuments, especially the terrils and parks, are generally accessible year-round. Spring and autumn offer pleasant temperatures for hiking and exploring, with vibrant foliage or blooming flora. Summer is great for longer days and outdoor activities, while winter can offer a different, serene perspective, though some paths might be muddy.
Yes, Vallée Carreau Park has stabilized paths that are ideal for easy walks and cycling, making it very accessible for beginners or those looking for a gentle stroll. Many of the terrils also have small paths that can be explored at a leisurely pace.
Lac de Beugin is an old quarry that has transformed into a tranquil lake. It's known for fishing, with species like carp, trout, and pike, and is a popular spot for relaxation on its shores while admiring the view.
Vallée Carreau Park is a redeveloped site that highlights the region's mining heritage. You can expect stabilized paths suitable for walking or cycling, leading to interesting features like the 'terriloscope,' which offers a unique perspective on the former height of the slag heaps. It's a great place to experience the blend of industrial history and natural regeneration.
While specific rules for each site are not detailed, generally, natural outdoor areas and trails in France are dog-friendly, especially if dogs are kept on a leash. It's always recommended to check local signage at each specific natural monument for any restrictions regarding pets.


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