Best castles around Watermael-Boitsfort - Bosvoorde offers a glimpse into the rich architectural past of this verdant municipality in the Brussels-Capital Region. The area features historical buildings with castle-like qualities, set within a landscape close to the Sonian Forest. Visitors can explore examples of 19th-century Belgian architecture and historical estates. This region provides a blend of cultural heritage and natural surroundings.
Last updated: May 11, 2026
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Two important lordships formed the basis of the current Hoeilaart: the lordship of Ter Heyde south of the IJse on the one hand, and the lordship of Holaer or Hoeilaart north of the IJse on the other. Here once stood the castle of the Ter Heyde lordship from the fifteenth century. That lordship ceased to exist after the abolition of the ancien régime. The current castle was built in 1858 on the orders of baron Jean de Man d’Attenrode (mayor of Hoeilaart from 1854-1878) and his wife Maria Carolina d’Ormesson. It is therefore not a remnant of the old lordship. BUT: the chapel and former closed farm next to it are. This building has now, as others have mentioned, been given a different function and dominates the view in the park. Inventory of Immovable Heritage: Kasteel van Hoeilaart, https://id.erfgoed.net/erfgoedobjecten/39785
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Viron Castle, designed by architect Jean-Pierre Cluysenaar in 1862, is now used as the town hall. The castle is situated at the highest point of Dilbeek's municipal park, north of the Sint-Alenatoren tower. The ice cellar is located west of the castle along Heetveldelaan. The castle, its outbuildings, and the park were designated as a protected monument and village view in 1990. (Inventory of Immovable Heritage)
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Excellent quality hotel and restaurant
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To see and don't hesitate to get lost there
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Beautiful but very busy. Good to know!
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Early in the morning to avoid the crowds
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Le Château du Lac is best known today as a 5-star hotel. Events are also often organised there and that is why I know it from a professional long-gone past. But the building, whether you call it a castle or rather a glorified villa, it does have a fairly intense past. In the past, the mineral water of Genval was collected and bottled here. Together with the source of Bonne Fontaine, the Château du Lac was the true symbol of Genval-les-Eaux. The Etablissement des Eaux, as it was originally called, was built between 1905 and 1907 by the architect Julien Wendrickx, the future production director of the Compagnie Internationale des Eaux Minérales, to house the collection of sources and the bottling of the mineral water of Genval. After the First World War and the receivership of the companies that managed the Genval site, the castle became the property of an English company before being taken over by the Princes of Merode, who leased the facilities to Schweppes Belgium. The Belgian branch was then managed by John Martin, an English brewer based in Antwerp, who had been importing beers from Great Britain and Ireland to the continent since 1909, including the famous Guinness. He obtained the exclusive production rights for the Schweppes range, which he transferred to Genval in 1952 following the deterioration in the quality of Antwerp's drinking water, which was now pumped into the Albert Canal. Since the divestment of Schweppes in 1988, the John Martin group has further diversified its range, with speciality beers (Timmermans, Gordon, etc.), soft drinks (Orangina) and fruit juices (Looza). After the Schweppes factory moved to Rue du Cerf, the château, now owned by the Martin family, was converted into the five-star Château du Lac Source: https://www.parismatch.be/lifestyle/voyages/2020/08/23/le-lac-de-genval-et-ses-villas-2D3Q25DBTVANBFBV5WXJG3R2NI/
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The Genval lake is located in the Zilverbeek valley. The artificial lake is located for the most part on the territory of Overijse and was constructed by order of lawyer and businessman Gustave Smets - Mondez. The 18 ha lake was constructed in 1904 in an area with a series of spring-rich ponds and marshes through which the Zilverbeek or the Argentine flowed. The Zilverbeek still flows along the lake on the Overijse side. The area attracted many tourists from the very beginning. Around 1900, the urban development plans were also drawn up for the construction of the park on the Walloon side. Several impressive villas were built here that were reminiscent of copies of buildings from Versailles and monuments on the Swiss Lake Lucerne. On the Overijse side, there was less interest in the construction, which is why the slopes are less developed than on the Walloon side, where it was promoted as a spa. After the First World War, the lake was sold to John Martin (1886-1966), an English brewer from Antwerp. He would establish the Schweppes factory here (Belgian license) in the "Château du Lac" (until 1981). The lake is still in the hands of his heirs. On the Meerlaan there are still a few cottage-style villas overlooking the lake. These villas are depicted on various old postcards and are still recognizable today but have been heavily modified. Inventory of Immovable Heritage: Maleizen, https://id.erfgoed.net/themas/14294
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The region features a variety of architectural styles, including Neo-Flemish Renaissance, Neoclassical, and 18th-century residential castles. Examples include the distinctive Château Charle-Albert and the elegant former Château Bischoffsheim.
Many castles in the area are privately owned or serve other purposes. For instance, the Château de La Hulpe and Domaine Solvay have parks that are freely accessible, but the castles themselves are generally not open for interior visits. The former Château Bischoffsheim now houses the International School of Brussels, and De Viron Castle serves as the town hall of Dilbeek.
Several castles offer family-friendly experiences, primarily through their accessible parks and grounds. Château de La Hulpe and Domaine Solvay are excellent choices, offering vast green spaces for families to explore. The area around The Little Mermaid of the Lake at Lac de Genval also provides a pleasant setting for families.
While Château Charle-Albert is privately owned and not open for interior visits, its unique Neo-Flemish Renaissance exterior and surrounding grounds can be admired from Avenue Charle-Albert. It's a significant landmark for those interested in 19th-century Belgian architecture.
Many castles in the region are nestled near beautiful natural settings. Château de La Hulpe and Domaine Solvay are surrounded by extensive forests, lakes, and meticulously maintained gardens. The former Château Bischoffsheim is set on a hill amidst woodlands, and The Little Mermaid of the Lake is located on the picturesque Lac de Genval, near the Sonian Forest.
Yes, the proximity of many castles to the Sonian Forest and large parks offers numerous walking opportunities. For example, the park surrounding Château de La Hulpe is freely accessible and features lush gardens and trails. Domaine Solvay also boasts 227 hectares of forest and lawns perfect for walks. You can find more walking routes in the area by exploring running trails or other outdoor activity guides for Watermael-Boitsfort - Bosvoorde.
Château Jolimont, dating back to the 18th century, showcases the architectural evolution of a significant estate over several centuries. It's located on a green estate and was classified as a protected monument in 2014, reflecting its rich history and architectural potential.
The area around Watermael-Boitsfort - Bosvoorde, particularly near the Sonian Forest, is excellent for various outdoor activities. You can find numerous running trails, road cycling routes, and MTB trails. Many of these routes pass through the beautiful natural landscapes surrounding the castles and parks.
Laeken Castle is one of the royal residences in Belgium and is surrounded by a large 120-hectare park, which also includes the Royal Greenhouses. While the castle itself is a working palace and not generally open to the public, the park and greenhouses are accessible during specific periods.
Visitors frequently appreciate the blend of historical architecture with the serene natural environment. The large, freely accessible parks and gardens, such as those at Château de La Hulpe and Domaine Solvay, are highly praised for their beauty and opportunities for relaxation and outdoor activities. The unique architectural styles, like the Neo-Tudor of De Viron Castle, also draw significant interest.
Yes, the Château du Lac, located on Lake Genval, is a notable example. Originally built in 1904, it now serves as a five-star hotel, offering a luxurious stay in a historic setting.
The parks and grounds surrounding the castles are beautiful year-round. Spring and summer offer lush greenery, blooming flowers, and pleasant weather for walking and outdoor activities. Autumn provides stunning foliage, while winter can offer a serene, picturesque landscape, especially around the Sonian Forest.


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