Qualla: Sonian Forest

Sonian Forest: Introduction

Sat, 16 May 2026 00:00:00 GMT

Photo credit GdML, CC BY-SA 4.0. Step off the tram at Bosvoorde on a weekday morning and within a hundred metres the noise of Brussels falls away as completely as if someone had closed a heavy door. The Sonian Forest begins almost without warning at the city's southern edge, and once you are inside it, the trees do most of the work. They are beech, mostly - tall, smooth-trunked, packed close enough that their crowns lock together a hundred and twenty feet overhead. The light filtering down is green, and the air is cool even in August. UNESCO inscribed parts of this forest as a World Heritage Site in 2017 because some of these beeches were saplings when Napoleon marched his army past on the way to Waterloo, twenty kilometres south, and a few of them, in the Joseph Zwaenepoel reserve, were already old then.

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Image: GdML | CC BY-SA 4.0

Sonian Forest: A Cathedral of Trees

Sat, 16 May 2026 00:00:00 GMT

Photo credit Caparbio, CC BY-SA 3.0. The Sonian gets called a "beech cathedral," and the comparison is fairer than most cliches. The trees grow tall and almost branchless for the lower thirty metres, their pale grey trunks rising like pillars, and the canopy closes overhead the way a ribbed vault does. The forest co...

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Image: Caparbio | CC BY-SA 3.0

Sonian Forest: Where the Dukes Rode

Sat, 16 May 2026 00:00:00 GMT

Photo credit William Sadler, Public domain. For five hundred years the Sonian belonged to whoever ruled Brabant. The Dukes hunted here; the Habsburgs hunted here; Napoleon's foresters logged it for ship timber and for the carriage of guns. The forest was reduced from perhaps eleven thousand hectares in the eighteenth centu...

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Image: William Sadler | Public domain

Sonian Forest: Three Highways, One Forest

Sat, 16 May 2026 00:00:00 GMT

Photo credit I would appreciate being notified if you use my work outside Wikimedia. More of my work can be found in my personal gallery., CC BY 3.0. The forest is not unbroken. Three major motorways - the N275, the R0 Brussels ring, and the E411 to Luxembourg - cut through it, and on a weekday rush hour the roar of traffic carries surprisingly far into the trees. The roads are deadly to wildlife: tens of thousands of frogs, b...

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Image: I would appreciate being notified if you use my work outside Wikimedia. More of my work can be found in my personal gallery. | CC BY 3.0

Sonian Forest: Ter Kameren, the City's Front Garden

Sat, 16 May 2026 00:00:00 GMT

Photo credit GdML, CC BY-SA 4.0. At the forest's north-western corner, the Sonian thins out and becomes the Bois de la Cambre, or Ter Kameren in Dutch - a hundred and twenty hectares of landscaped park that the city pushed into the woodland in the 1860s. The straight ducal allees give way to winding paths, an ar...

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Image: GdML | CC BY-SA 4.0

Sonian Forest: When to Go

Sat, 16 May 2026 00:00:00 GMT

Photo credit Daderot, Public domain. April brings carpets of wood anemone, low white stars that flood the forest floor between the beech trunks. In May the bluebells arrive - in the neighbouring Hallerbos, twenty kilometres south, they create the famous Blauwe Bos that draws photographers from across Europe; in the ...

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Image: Daderot | Public domain