Natural monuments around Aubange offer a variety of landscapes in the Belgian province of Luxembourg. The region features areas where nature has reclaimed former industrial sites, creating unique ecosystems. Visitors can explore a mosaic of biotopes, including forests, wetlands, and geological formations. Aubange provides opportunities to observe diverse flora and fauna within its natural heritage sites.
Last updated: June 28, 2026
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The Trench of Gates: Gateway to Gaume, Gateway to Legends 1. What is it? Physical Description The Trench of Gates is a deep and spectacular rocky gorge, naturally carved by the Vire River (a tributary of the Semois) into the sandstone plateau of the Gaume forest. Located in the village of Dampicourt (commune of Rouvroy), on the French border, it forms a narrow and winding notch, framed by high sandstone walls and strangely shaped rocks. Its name comes from its topography: the site gives the impression of crossing several successive natural "gates." 2. A Strategic Position: Military History The true fame of the Trench of Gates comes from its historical role as a natural fortress and strategic border post. A Gallic Stronghold? : Its easily defensible configuration suggests that it was used as a refuge since the Gallic era. The Roman Fort: Its strategic role became evident during the Roman era. The Romans established a castellum (a fortified camp) there to control the passage between Belgic Gaul and Imperial Trier, and to protect the nearby Roman road. Remains of these fortifications were still visible several centuries ago. A Millennial Challenge: Due to its position on the border, the site has been contested and fortified throughout history, from the Middle Ages to modern wars. It offered an ideal control point over one of the few passable passages through the region's wooded terrain.
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The trail from this viewpoint is a real balancing challenge towards the end, very rocky with large gravel. It seems to me that a few years ago the trail was not so perilous. It is part of the official permanent route "La Croix Renson en Gaume" which advises to do it clockwise, so this uphill trail is impossible! Except for a trialist with Hulk legs and a motorcycle traction. 🙄
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It depends which way... 😀😇
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It stings a little 😂
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The origin of the place's name is mysterious. According to some, this name comes from a transcription of the name "Trou du Perdu" (Perisher's Hole). Amidst pine trees, heather, and blueberry bushes, this place represents a steep landscape where the Fourneau stream has shaped a gorge with a waterfall. A little higher up, a waterfall has formed and accentuates the erosion downstream. Above, the stream trickles over a slab of black sandstone. This formed above a significant layer of waterproof marl that stopped the infiltration of the sand present here to above it. A beautiful waterfall has formed due to the presence of the stream and the erosion that followed.
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The Tranchée des Portes covers an area of 100 hectares. It is the largest Iron Age stronghold in Belgium. This development required an abundant workforce. The construction and maintenance of the rampart suggest a well-organized social entity. Unlike Montauban, which was occupied occasionally, the Tranchée des Portes is not a refuge but an oppidum, that is to say, a fortified site where people settled for the long term with their livestock and crops. It is a fortification that owes its name to the deep ditch (5 m) that precedes its rampart. Consisting of an earthwork over 3 m high, formerly surmounted by a palisade, this barrier, pierced by 3 gates, extends over 1 km. This type of defensive site is called a barred spur. It was often used in the protohistoric period (Iron Age). We chose a place with 2 or 3 steep and almost impassable sides and we blocked access by building a wall on the vulnerable side with what we found on the site (stones, trees, earth)
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One of the most unique natural monuments is the Giele Botter Nature Reserve, a former open-pit mine successfully reclaimed by nature. It's known for its diverse ecosystems, including wild orchids, and is a habitat for numerous amphibians, reptiles, and birds. Another fascinating site is Cron de Montauban, characterized by petrifying limestone springs and remarkably contrasting vegetation supporting rare plant and animal species.
Yes, you can visit the Trou du Pérou Waterfall, a rugged waterfall hidden within dense forests where the Fourneau stream has shaped a gorge. For scenic views, the Éperons Barrés Viewpoint offers an exceptional panorama of the Neuve Forge valley, including views of ancient Iron Age fortifications.
The area around Aubange offers various outdoor activities. You can find numerous cycling routes, including gravel biking and touring bicycle options. For example, there are routes like the "Trou du Pérou Waterfall – Tranchée des Portes Oppidum loop from Rachecourt" for gravel biking, or the "Bridge Over the Messancy – Lake Messancy loop from La Messancy" for touring. Mountain biking is also popular, with trails such as the "Rocky Cliff with Cave – Giele Botter Nature Reserve loop from Athus." You can explore more routes and their details on the respective guide pages for Gravel biking around Aubange, Cycling around Aubange, and MTB Trails around Aubange.
Yes, the Giele Botter Nature Reserve is considered family-friendly, offering discovery trails suitable for various ages. The Éperons Barrés Viewpoint is also listed as family-friendly, providing accessible views and a chance to learn about local history.
The Tranchée des Portes Oppidum is a significant historical site and natural monument. It's an ancient fortified site dating from the Neolithic period, later occupied by Celts and Romans, featuring remains of an earthen rampart and ditch. The Éperons Barrés Viewpoint also offers insights into Iron Age fortifications like the Châtelet and Dent de Chien.
The Giele Botter Nature Reserve is special because it's a prime example of nature reclaiming an industrial site. This expansive 255.30-hectare area, once an open-pit mine, now hosts a rich and diverse ecosystem with wild orchids, amphibians, reptiles, and birds. It's recognized as a UNESCO-listed site for its geological features and historical significance, offering two main trails for exploration. For more detailed information, you can visit the Visit Luxembourg website.
While specific guided tours for all natural monuments are not detailed in the guide, the Prënzebierg-Giele Botter Nature Reserve does offer discovery trails with informative panels. For potential guided tour options specifically for the Giele Botter, you might check resources like the Visit Luxembourg guided tour page.
The natural monuments around Aubange, particularly areas like the Giele Botter Nature Reserve with its diverse flora and fauna, are generally best enjoyed during spring, summer, and early autumn. These seasons offer pleasant weather for hiking and allow visitors to experience the vibrant plant life, including wild orchids, and observe wildlife. Winter can also be beautiful for quiet, crisp walks, but some trails might be more challenging.
The guide data does not explicitly state dog-friendly rules for all natural monuments. However, many natural areas in Belgium generally permit dogs on a leash. It is always recommended to check specific regulations for each site, such as the Giele Botter Nature Reserve, before your visit to ensure compliance.
The Giele Botter Nature Reserve features a 2.6 km "Giele Botter" geological nature trail, which is generally considered an easier option for exploring the area. While some highlights are rated intermediate or challenging, many natural areas offer shorter, less strenuous paths suitable for a relaxed walk.
The natural monuments around Aubange are rich in biodiversity. The Giele Botter Nature Reserve is a refuge for numerous rare animals and plants, including a wide variety of amphibians, reptiles, insects, bats, and birds. At Cron de Montauban, you might spot rare plant species like parnassia and flea sedge, and it's a habitat for the rare bidentate cordulegaster dragonfly.
The duration of your visit depends on the specific natural monument and your activity. For instance, the Giele Botter Nature Reserve offers two main trails: a 7.6 km discovery trail and a 2.6 km geological nature trail, which could take a few hours to half a day to explore thoroughly. Shorter visits to viewpoints or waterfalls might only require an hour or two.


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