Best natural monuments in Bertembos En Grevensbos are found within two interconnected forest complexes north of Bertem. These areas are part of a larger Natura 2000 protected zone, highlighting their ecological importance. The region features diverse forest ecosystems, including acidic oak forests and beech avenues, alongside significant historical elements. It offers varied terrain, including numerous colluvial valleys and hollow roads, suitable for outdoor activities.
Last updated: July 5, 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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The sunken road itself is quite beautiful with lots of life in the verges. The surface consists of pebbles for the most part. Especially down below it is beautiful with a view of the valley. On the other side, on the Bosstraat, you will find an information board about the area.
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If you walk from Bertembos to the Eikenbos (or vice versa) you will inevitably come to the Bosstraat that connects Bertem with Veltem-Beisem at some point. At this crossing of the road you will find an information board about Bertembos and the nature reserve De Koeheide that lies south of Bertembos. Of course, that Natuurpunt sign is not there for no reason. At this location there is a parking lot (where the Bosstraat and the short Oude Bertembosstraat meet) and at the same time one of the three starting points where you can start one of the Natuurpunt routes. The rest you can see on the board and on the spot and on the walking map and info (see the three arrows with the three starting points) on https://www.natuurpunt.be/natuurgebieden/koeheide#kaart By the way, you also have beautiful views here if you walk along the Bosstraat, because you are almost at the highest point of this fairly busy connecting road between the highway from Leuven to Brussels via Kortenberg and the highway from Leuven to Tervuren. Irrelevant info: one of my nieces lives at the end of the Bosstraat, so don't honk when you drive here ;)
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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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The sunken road looks like a dry stream...
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A beautiful walking path that follows the worn hollow road. The old trees make your experience magical.
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The region is renowned for its numerous colluvial valleys and distinctive hollow roads, such as the Hollow Road of Stierke and Bremstraat, which offer varied perspectives and unique flora. You'll also find diverse forest ecosystems, including acidic oak forests with rich spring flora like wood anemones, and impressive beech avenues.
While primarily natural, the area also holds historical significance. You can discover the Bertembos Hunting Lodge, a historic building nestled in the woods that once accommodated aristocratic hunting parties. Additionally, the Augustijnerhoeve, a protected farm with roots dating back to the 13th century, adds a cultural dimension to the natural setting.
The Bertembos and Grevensbos areas are particularly stunning in autumn, when the foliage displays vibrant orange and brown hues. Spring is also a beautiful time, with acidic oak forests showcasing a rich spring flora, including prominent wood anemones.
The forests are a haven for biodiversity. It's a bird paradise, home to species like the goshawk, buzzard, nuthatch, and black woodpecker. Roe deer can often be spotted at the forest edges during early morning or dusk. The area also hosts alpine newts and rare common lizards.
Yes, the region is excellent for families. Bertembos and De Koeheide Nature Reserve is noted as family-friendly. Within Bertembos, you'll find Het Vossenhol Play Forest, a 5-hectare area designed for imaginative play with natural elements like branches and huts, and a large play meadow suitable for picnics.
Het Vossenhol Play Forest, located within Bertembos, features paved footpaths, making it accessible for wheelchair users. However, many of the hollow roads, such as the Hollow Road of Stierke, can be steep, muddy, and slippery, making them less suitable for wheelchairs or strollers.
The terrain is varied, characterized by numerous colluvial valleys and hollow roads. Trails can range from deeply worn paths like the Hollow Way in Nationaal Park Brabantse Wouden, which offers cooling shade, to steep and potentially muddy sections, as described for the Hollow Road of Stierke. Surfaces can include pebbles, and some paths are described as natural tunnels of thickets.
The Bertembos and Grevensbos areas are ideal for various outdoor activities. You can enjoy hiking, cycling, and horseback riding on well-maintained and clearly marked paths. For specific routes, explore the easy hikes, gravel biking, or road cycling routes available in the region.
Yes, there are several hiking opportunities. You can find easy hikes like the 'Play forest 't Vossenhol – Het Vossenhol Play Forest loop' or 'Bertem Forest in Autumn' routes. These trails allow you to experience the diverse forest ecosystems and hollow roads. For more details, refer to the easy hikes guide for Bertembos En Grevensbos.
Visitors particularly appreciate the peaceful atmosphere, which allows for a deep connection with nature and opportunities to observe diverse wildlife. The beautiful scenery, especially the vibrant autumn colors, is a highlight. The unique hollow roads, like the Hollow Way in Nationaal Park Brabantse Wouden, are also highly valued for their cooling shade and abundant life.
A parking lot is available at the crossing of Bosstraat and Oude Bertembosstraat, which serves as one of the starting points for routes within the Bertembos and De Koeheide Nature Reserve. This makes it a convenient spot to begin your exploration.
Yes, the Hollow Road of Stierke is notable for its red chalice mushrooms found at the end of winter and a large population of blackthorn, which is crucial for the endangered blackthorn wings butterfly. Similarly, Bremstraat features a beautiful and large blackthorn stock, making it a butterfly spot par excellence.


Extend your search for the best caves by checking out these guides of the top ones in Bertembos En Grevensbos: