Best lakes around Chaumont-Gistoux are situated in a region characterized by its green settings, bordering areas like the Soignes forest, Walloon Brabant, and the Brabant Ardennes. The area features both natural and artificial lakes, often serving as popular local tourist spots. These bodies of water are integrated into the landscape, providing opportunities for various outdoor activities and nature observation. The Dyle valley also contributes to the region's natural appeal, hosting significant marshland areas.
Last updated: July 9, 2026
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Excellent quality hotel and restaurant
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The Warandevijver pond was built by order of the Duke of Arenberg some 300 years ago. At that time, Meerdaalwoud was the dukes' hunting grounds. A "warande" (warden) often refers to a (closed) hunting area and/or open space where game was kept. It's a lovely picnic bench where I used to picnic with my parents decades ago.
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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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"La sirène du lac", as sculptor Michal named his statue, stands in the lake at the height of - of course - "Le Château du Lac", today a hotel. This siren apparently preferred an artificial lake to a river or sea, but people are said to sometimes think of eroticism when they are near water, and ultimately erotic song is the seductive weapon of sirens. We should not spoil the legacy of Hans Christian Andersen's "Lille Havfrue" by making comparisons, because that little mermaid grew up in the sea and has a statue in a harbour instead of a large lake that was created on behalf of a lawyer and businessman. The statue was commissioned by Jean Vanderbecken (RIP), former mayor of Rixensart for the MR, and fits in perfectly with the atmosphere of the "Château" and the "lake" as it has been developed on the French-speaking side.
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Genval Lake is an atmospheric spot with beautiful clear water, surrounded by stately old villas and shady trees. A picturesque path follows the banks, ideal for a walk along the rippling water.
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Several lakes in the region are considered family-friendly. Lake Genval is a popular tourist spot with activities like angling, sailing, and canoeing, and features the nearby Little Mermaid of the Lake statue. Pécrot Pond offers a quiet place for picnics and birdwatching, while Lake Louvain-la-Neuve has a footpath with a Finnish track, ideal for walks and leisure.
Yes, many lakes offer accessible paths. Lake Louvain-la-Neuve features a dedicated footpath with a Finnish track, perfect for leisurely strolls. The areas around Lake Genval and Pécrot Pond also provide pleasant environments for walks, often integrated into the green settings of the Dyle valley.
The region around Chaumont-Gistoux offers a variety of outdoor activities. You can enjoy hiking on trails like the 'Riverside Path in Longueville' or explore the 'Bonlez Wood – Bois de Glabais' loops. Cycling is also popular, with routes such as the 'Cobblestone Switchback – The Train loop'. For mountain biking enthusiasts, there are trails like the 'Forest Trail With Stream Bed'. You can find more details and routes in the dedicated guides for hiking, cycling, and MTB trails around Chaumont-Gistoux.
Yes, particularly around Lake Genval. The lake is known for its opulent Belle Epoque villas, including the prestigious Château du Lac, which now serves as a five-star hotel. Additionally, you can find The Little Mermaid of the Lake statue, a bronze sculpture inspired by the Copenhagen landmark, situated on a rock in the lake.
The lakes are set within green landscapes, bordering areas like the Soignes forest and the Brabant Ardennes. Pécrot Pond, classified as Natura 2000, is a significant marshland area in the Dyle valley, providing an ideal habitat for many water birds. Warande Pond is nestled within the large Meerdaalwoud forest, offering an idyllic green spot.
While some lakes like Lake Genval offer activities such as sailing and canoeing, specific information about designated wild swimming areas is not readily available. It's always recommended to check local regulations and safety guidelines before attempting to swim in natural bodies of water.
Visitors appreciate the tranquil and green settings of the lakes. Many enjoy the beautiful environment around Lake Genval, despite it sometimes being busy. Pécrot Pond is valued for its quiet atmosphere and as a spot for birdwatching and picnics. The walking and leisure routes, like the Finnish track at Lake Louvain-la-Neuve, are also popular.
While not explicitly 'hidden,' Warande Pond offers a serene experience. It's described as an idyllic spot with a picnic bench in the middle of the large Meerdaalwoud forest, providing a peaceful escape away from more bustling areas.
The lakes and surrounding natural areas generally offer pleasant walking opportunities that are often suitable for dogs. However, specific regulations regarding dogs (e.g., on-leash requirements, restricted areas) can vary by location. It's advisable to check local signage or official websites for each specific lake or park you plan to visit to ensure compliance.
The lakes can be enjoyed throughout the year, with each season offering a different charm. Spring and summer are ideal for outdoor activities like walking, cycling, and water sports, with lush greenery and pleasant temperatures. Autumn brings beautiful foliage, while winter can offer peaceful, crisp walks, especially around lakes bordering forests like Lake Genval and Warande Pond.
Yes, particularly around Lake Genval. There are several restaurants located right on the water's edge, allowing visitors to enjoy dining with scenic views. For other lakes, it's best to check local amenities in nearby towns or villages.


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