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Wallonia
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Lasne

Top 20 Castles around Lasne

Best castles around Lasne are situated in a municipality within Walloon Brabant, characterized by its green surroundings and historical significance. The area features a mix of manor houses and impressive châteaux, offering insights into regional history and architectural heritage. These sites are often nestled in serene environments, providing opportunities for walks and exploration. The landscape includes vast parks, wooded areas, and cultivated gardens, contributing to the region's natural appeal.

Best castles around Lasne

  • The most popular castles is Château de La Hulpe, a castle that was built in 1842 on the model of the Loire castles. It is surrounded by lush gardens decorated with sculptures, and its expansive park is freely accessible.
  • Another must-see spot is Château Le Châtelet, a medieval castle. In the middle of its courtyard rises a massive three-storey schist keep from the 12th or 13th century, making it a rare example of fortifications from this period.
  • Visitors also love Château de Bois-Seigneur-Isaac, a former feudal fortress transformed into an 18th-century pleasure castle. It features a charming French garden extended by a pleasant English-style park with many remarkable trees.
  • Lasne is known for medieval fortresses, 18th-century pleasure castles, and 19th-century châteaux. The variety of castles to see and explore reflects different historical periods and architectural styles.
  • The castles around Lasne are appreciated by the komoot community, with 1516 upvotes and 323 photos shared by visitors.

Last updated: May 11, 2026

Château de La Hulpe

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Castle in a beautiful large park... Beautiful hedges and ivy give it a green tint...

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Domaine Solvay

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A few minutes from Brussels, in the heart of Walloon Brabant, the park houses the Château de Béthune, built in 1842 on the model of the châteaux of the Loire. It is surrounded by a perfectly symmetrical French garden, decorated with decorative statues. The Château de La Hulpe is now owned by the Walloon Region.

The castle is not open to the general public, but is suitable for all kinds of events.
destinationbw.be/nl/ontdekken/de-hoogtepunten/het-gewestelijk-domein-solvay

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Hoeilaart Castle

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Neo-Gothic castle, founded in 1858 after a design by engineer Jozef Claes (Antwerp) on the site of the 15th-century castle of the seigniory of Ter Heyde. The castle is surrounded by a park that today functions as a municipal park. To the east of the castle is the former castle farm with the chapel, both rising in core until the 17th century.

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The Little Mermaid of the Lake

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The Little Mermaid of the Lake, in Genval!
Last Sunday June 30 (2019), it was the inauguration of the Little Mermaid of Lake Genval. A Little Mermaid, like the one in Copenhagen, but smaller. The small bronze statue sits on a rock in the waters of Lac de Genval, in front of the Château du Lac. It is the work of Michal, whose real name is Michel Alexandre Neuwels, sculptor from Plancenoit (Lasne).
facebook.com/MagazineBW/posts/2586373058053274

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Château Le Châtelet

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Medieval castle that was inhabited in 1219 by the lords of Marbais.
In the middle rises a massive three-storey schist keep from the 12th or 13th century.
It is one of the rare fortifications from this period.
villers-la-ville.net/nl/2014/06/11/het-poortgebouw

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JP
April 2, 2026, Kasteel van Hoeilaart

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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Nassim
November 5, 2025, Château Le Châtelet

The Old Castle of Marbais is a 13th-century medieval castle. It is located on a rocky spur overlooking the confluence of the Thyle and the Ri des Goutailles valley, in Marbais, within the municipality of Villers-la-Ville. This site was once part of the former seigneury of Marbais.

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Excellent quality hotel and restaurant

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Steph
April 11, 2025, Domaine Solvay

To see and don't hesitate to get lost there

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Nadia
February 24, 2025, Château de La Hulpe

Beautiful but very busy. Good to know!

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Early in the morning to avoid the crowds

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JP
December 23, 2024, La Petite Sirène du Lac

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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JP
December 21, 2024, La Petite Sirène du Lac

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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Frequently Asked Questions

Which are the most notable castles and manor houses around Lasne?

The region features several significant sites. Among them are Château de La Hulpe, known for its Loire-style architecture and expansive park, and Château Le Châtelet, a medieval castle with a rare 12th or 13th-century schist keep. Also noteworthy is Château de Bois-Seigneur-Isaac, a former feudal fortress transformed into an 18th-century pleasure castle with beautiful gardens. The Manoir de Lasne, while private, is a local landmark with a vast park.

What kind of historical architecture can I expect to see?

You'll find a range of architectural styles reflecting different historical periods. Château Le Châtelet showcases medieval fortifications with its ancient keep. Château de Bois-Seigneur-Isaac represents an 18th-century transformation from a fortress to a pleasure castle, while Château de La Hulpe is a 19th-century design inspired by the châteaux of the Loire Valley.

Are there opportunities for outdoor activities near these castles?

Yes, the areas around these castles offer excellent opportunities for outdoor activities. For instance, the expansive park of Château de La Hulpe (Domaine Solvay) is perfect for walks. You can find numerous hiking routes, cycling tours, and MTB trails throughout the Lasne region, many of which pass by or near these historical sites.

Which castles are family-friendly for a visit?

Many of the castle estates are family-friendly, particularly due to their accessible parks and gardens. The Domaine Solvay, surrounding Château de La Hulpe, is freely accessible and offers vast spaces for children to explore. Château de Bois-Seigneur-Isaac also features charming gardens suitable for a family stroll.

Can I visit the interiors of these castles?

Access to the interiors of these castles varies. For example, Château de La Hulpe is generally used for events and not open to the public, though its park is freely accessible. The Manoir de Lasne is primarily for private hire. Château de Bois-Seigneur-Isaac opens its doors for weddings, receptions, and other events, and sometimes for public tours through its 'Friends' association. It's best to check specific opening times and access conditions for each site.

What natural features can I enjoy around the castles?

The castles are often set within beautiful natural environments. The Domaine Solvay, home to Château de La Hulpe, boasts 227 hectares of forest, lawns, and ponds, with diverse plant and tree species. Château de Bois-Seigneur-Isaac features both French and English-style parks with remarkable trees and a romantic arbor. The Manoir de Lasne also has a private 4-hectare wooded area.

Is public transport available to reach the castles?

While Lasne is a charming municipality, direct public transport links to some of the more secluded castles might be limited. For sites like Château de La Hulpe (Domaine Solvay), there are often bus connections from nearby train stations. However, for others like Château Le Châtelet or Château de Bois-Seigneur-Isaac, driving or cycling might be the most convenient options. Parking is generally available at or near the larger estates.

What is the best time of year to visit the castles and their grounds?

Spring and summer are ideal for visiting, as the gardens and parks are in full bloom, offering beautiful scenery for walks and outdoor activities. Autumn also provides stunning foliage. While some parks remain accessible in winter, the full beauty of the gardens might be diminished. Always check specific opening hours, especially for private estates, as they can vary seasonally.

Are there any viewpoints or scenic spots near the castles?

Yes, many of these estates offer picturesque viewpoints. The vast parks of Château de La Hulpe and Château de Bois-Seigneur-Isaac provide scenic vistas of the châteaux themselves, their meticulously maintained gardens, and the surrounding countryside. The Little Mermaid of the Lake at Lake Genval, near the Château du Lac, also offers a charming photo opportunity.

What amenities are available near the castles, such as cafes or restaurants?

The larger estates, particularly Domaine Solvay, often have cafes or refreshment points within or very close to the park. The surrounding towns and villages, including Lasne itself, offer a selection of restaurants and cafes. For example, the area around Lake Genval, with its Château du Lac hotel, provides dining options.

How long should I plan for a visit to a castle estate?

The duration of your visit depends on the specific castle and your interests. For estates with extensive parks like Château de La Hulpe (Domaine Solvay), you could easily spend half a day or more exploring the grounds and enjoying a walk. For smaller sites or those primarily viewed from the exterior, an hour or two might suffice. If you plan to combine a castle visit with a hike or bike ride, allocate more time.

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