Canyons around Bierbeek are characterized by "holle wegen," or sunken lanes, which are deep, trench-like passages formed by centuries of erosion. These features create a distinctive landscape with steep, vegetated banks, offering a unique natural immersion. The region's "holle wegen" are vital ecological corridors, supporting diverse flora and fauna due to their sheltered, moist microclimates. They are also integral to the extensive network of hiking trails, providing varied terrain for outdoor activities.
Last updated: June 3, 2026
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The sunken road itself is used by the more adventurous and probably younger cycling adventurer, judging by the small sand-jumping hills constructed in it.
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A sunken road is a road that is so deeply worn that it lies between two slopes. It is the result of centuries of use and erosion. The most beautiful sunken roads can be found especially in hilly areas with a subsoil that easily forms steep walls, such as in Haspengouw and Hageland.
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A sunken road is a road that is so deeply worn that it lies between two slopes. It is the result of centuries of use and erosion. The most beautiful sunken roads can be found especially in hilly areas with a subsoil that easily forms steep walls, such as in Haspengouw and Hageland.
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Lovely walking path that winds along an old sunken road.
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Currently difficult to walk, very swampy.
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This narrow sunken road resembles a rain-soaked deep stream between the trees...
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After a lot of rainfall it can look quite acrobatic...
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The 'canyons' around Bierbeek are actually known as "holle wegen," or sunken lanes. These are deep, trench-like passages formed over centuries by water runoff and continuous use, sinking significantly lower than the surrounding land. They create a distinctive landscape with steep, vegetated banks, offering a unique natural immersion.
The "holle wegen" are vital ecological corridors, supporting a rich diversity of flora and fauna due to their sheltered, moist microclimates. You can find various ferns and woodland plants, and they serve as refuges for wildlife such as birds, bats, and foxes. The Deep sunken lane is particularly noted for its special ecosystems.
Yes, the Deep sunken lane is known for its depth, reaching up to 10 meters, offering a striking contrast with the surrounding fields. Another impressive spot is the double sunken lane on the flank of the Meesberg, where you can see a GR path dug deeper than an adjacent MTB route, creating a unique view from the dividing berm.
Bierbeek's sunken lanes are integral to an extensive network of hiking trails, offering varied terrain. You can explore areas like Mollendaalbos and Meerdaalwoud, which feature numerous deep, wooded "holle wegen." The Hollow Way and Steps Huldenberg offers a slightly technical experience with a nice view and stairs, suitable for various users.
Many of the trails through the "holle wegen" are suitable for families. The Mollendaalbos, for instance, is a popular destination for hikers and families, offering well-signposted circular walks. While some sections can be technical, like parts of the Hollow Way and Steps Huldenberg, many paths are accessible for a pleasant family outing.
Absolutely! The region around Bierbeek offers excellent opportunities for both mountain biking and running. You can find numerous trails that incorporate or run alongside the sunken lanes. For specific routes, check out the MTB Trails around Bierbeek guide or the Running Trails around Bierbeek guide for detailed options.
The "holle wegen" offer a unique microclimate, being cooler in summer and milder in winter, making them pleasant to visit year-round. However, after significant rainfall, paths like the Beautiful sunken lane can become quite scenic but also more challenging and muddy. Spring and autumn offer beautiful foliage and comfortable temperatures for hiking.
Given the varied terrain and potential for mud, especially after rain, sturdy waterproof hiking shoes are highly recommended. Layers of clothing are advisable to adapt to the microclimates within the sunken lanes. For more adventurous routes like Vernagelstraat, which can resemble a rain-soaked stream, be prepared for potentially wet conditions.
Visitors appreciate the unique natural beauty and the sense of immersion these deeply incised paths provide. The rich biodiversity and the tranquil, enclosed feeling are often highlighted. The contrast between the depth of the sunken roads and the vastness of the rolling fields, as seen near the Deep sunken lane, is also a popular aspect.
Yes, some sunken lanes offer a more challenging experience. The Hollow Way and Steps Huldenberg has sections that are slightly technical, suitable for beginner MTBers but still engaging. The Vernagelstraat is described as a narrow sunken road resembling a deep stream, often used by more adventurous cyclists due to small sand-jumping hills.
The "holle wegen" have a long history, with some dating back to Roman times. They tell stories of how people and goods moved through the landscape for centuries, gradually eroding the paths. They are considered valuable heritage elements and are part of the region's cultural history, reflecting centuries of human interaction with the landscape.
Yes, the region offers several circular walks that prominently feature the "holle wegen." For example, the "Thick Oak Walk" is a 12.7 km route that leads through picturesque sunken lanes and the Mollendaalbos. Another option is the "Hollow Way – Kwabeek Castle and Park loop," which explores historic sunken lanes and the grounds of Kwabeek Castle.


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