Natural monuments around Masny include a variety of sites, from former industrial landscapes transformed into natural areas to wetlands and unique geological features. The region's terrain, shaped by both natural processes and historical activities, offers diverse environments for exploration. These areas provide opportunities to observe local biodiversity and experience distinct natural features. The vicinity of Masny features several significant natural sites of interest.
Last updated: May 20, 2026
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beautiful mountain bike playground
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The menhir is located in the marsh of Aubigny-au-Bac, on a footpath leading to Brunémont. It is a block of Landenian sandstone 2.90 m high (including 1.48 m above ground) by 2.15 m wide and 0.70 m thick. It is said to have been sunk to about 2.40 m. Shaped like a horse's head, it is associated with a prehistoric megalith despite the absence of evidence.
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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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Mandatory and iconic stopover in the region
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Very beautiful monument of local history to discover during a walk in nature.
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It is a magical place, sheltered in a small clearing, which is accessed by a footbridge. Don't make (too much) noise ...
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fairly steep climb but not too high (40m D +)
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Visitors frequently enjoy the transformed industrial landscapes. Among the most popular are Terril des Argales, known for its layout around an ornithological reserve pond and panoramic views, and Terril de Roeulx, which offers schist tracks for mountain biking and gravel cycling, leading to a summit with broad views of the surroundings.
Yes, the Marais de Wagnonville, located just north of Douai, is a regional nature reserve. It features a rich diversity of aquatic environments, including a main pond, reed beds, a sphagnum peat bog, and woodlands. It's an excellent spot for nature observation and birdwatching, home to over 100 animal species and around 200 plant species.
The region is characterized by its transformed industrial landscapes, particularly slag heaps, which are man-made hills of mining waste that have been reclaimed by nature. These sites often feature distinct areas with red and black shale. Additionally, you can find unique historical elements like the stone that grows, a listed historical monument and a block of Landenian sandstone with local legends surrounding it.
The natural monuments around Masny offer diverse opportunities for outdoor activities. Many slag heaps, like Roost-Warendin Slag Heap 138, provide varied terrain for hiking and mountain biking with numerous single tracks. The gravel biking routes around Masny and general cycling routes often incorporate these natural areas, offering scenic rides.
Yes, several sites are suitable for families. The stone that grows is listed as family-friendly, offering a short walk to a historical monument in a clearing. The Terril de Rieulay, while not a highlight in the guide, is a repurposed industrial site with a pond and beach, offering activities like canoeing and paddleboarding, and even a goat farm, making it a great family destination.
The natural monuments are generally accessible year-round. Spring and autumn offer pleasant temperatures for hiking and cycling, with vibrant foliage or blooming flora. Summer is ideal for water-based activities at sites like Terril de Rieulay, which features a beach. Winter can offer a different, serene perspective, though some paths might be muddy.
Yes, many of the transformed slag heaps provide excellent viewpoints. For instance, Terril des Argales offers various promontories for unobstructed views of the region. Similarly, reaching the top of Terril de Roeulx provides a panoramic perspective of the surrounding landscape.
You'll find a variety of trails. Many slag heaps, such as Roost-Warendin Slag Heap 138, feature numerous single tracks forming a labyrinth among birch trees, offering varied terrain. Other sites, like Terril 125 of Sainte-Marie, have trails accessible by gravel bike, though some may require navigating rocks. The Terril de Rieulay also boasts numerous paths for hiking and mountain biking.
The Terril de Rieulay, though not a highlight in this guide, is the largest slag heap in the region, covering 140 hectares. It's significant because it has been successfully transformed into a vibrant natural and recreational area. It features an expansive pond with a beach, a nautical base for water sports, and an ornithological reserve. Its diverse landscape, including distinct shale areas and panoramic views, makes it a unique blend of ecological interest and outdoor recreation.
Visitors particularly appreciate the unique transformation of industrial landscapes into natural havens. They enjoy the diverse opportunities for outdoor activities like mountain biking on challenging single tracks, gravel cycling on scenic routes, and hiking to viewpoints. The blend of natural beauty with historical industrial heritage, and the chance to observe local wildlife, are frequently highlighted as key attractions.
Yes, the region's history is often intertwined with its natural sites. For example, the stone that grows is a historical monument, a menhir listed since 1979, located within a natural clearing. The slag heaps themselves, like Terril 125 of Sainte-Marie, represent a significant part of the region's industrial past now reclaimed by nature, offering a unique cultural landscape to explore.
While specific public transport routes directly to every natural monument might be limited, Masny and surrounding towns are generally served by regional transport networks. It is advisable to check local bus schedules or regional train connections to nearby towns and then consider a short walk or taxi to the specific sites. For detailed planning, local tourism offices can provide the most up-to-date information.


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