Best natural monuments around Tienen offer a diverse landscape for exploration. The region, situated in Flemish Brabant, features rolling hills, forests, and water bodies that contribute to its natural heritage. These areas provide opportunities to experience local biodiversity and tranquil environments. The natural sites around Tienen serve as green spaces for outdoor activities and nature observation.
Last updated: May 1, 2026
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Popular around Tienen
Very relaxing, beautiful well-maintained paths.
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The core of Horst Castle probably dates back to the 13th century and is characterised by a square keep. The keep probably belonged to the oldest core that was further expanded into a fortified castle in the 15th century. During the troubles under Maximilian of Austria in 1489, the castle of Horst was taken by the people of Leuven and set on fire. According to literary sources, only the keep, part of the entrance gate and a defensive wall remained standing. The residential and east wing were renovated and expanded in the 16th century. The round tower also dates from this period. The outer wall was provided with a rectangular bay window. The castle lost its military character and became more of a pleasant residential area with a view of the moat, the ponds and the inner courtyard. Brick construction with sandstone layers characterise these buildings. In 1587, however, the castle was set on fire again during the raids of the Geuzen. It was not until the beginning of the 17th century that restoration work began. It is difficult to deduce from the available sources to what extent this involved restoration or an embellishing conversion of the castle complex. Presumably nothing changed in the internal structure, but only after the structurally necessary repairs were the interiors completely refinished. Maria-Anna Van den Tympel had a new chapel built against the keep in the 17th century. At the beginning of the 19th century, the complex must have been damaged by plundering and neglect, and it is possible that it also suffered from plundering during the Brabant Revolution of 1830. Around 1850, the castle must have been habitable again, but the castle buildings only served as a farm. In the land registry, the site around the castle is called "De Notelaren Boomgaerd". Around that time, the most dilapidated part must have been demolished, namely the southern part and the superstructure of the gate. The rest of the complex was probably restored with reused demolition material and in traditional style. The castle was divided in 1880, with one part being registered as a school house. In 1897, a further division followed, with two plots being designated as houses. Several restoration campaigns followed in the 20th century. Inventory of Immovable Heritage: Horst Castle, https://id.erfgoed.net/erfgoedobjecten/43619
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Since December, there has been a spire on the castle again after the unstable spire was removed more than four years ago and could be viewed on a wooden platform in the pond. Now it is back. And the other works are also progressing quickly. More about the replaced spire on https://www.vrt.be/vrtnws/nl/2024/12/10/torenspits-staat-weer-op-kasteel-van-horst-holsbeek/
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Already 304 years old? Time flies!
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For those who have traded in their horse for a steel steed. Information boards and such on site.
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Until 1989, the steep Kalvariebos (83 m) was part of the nearby castle park 't Serclaes. The beech forest is now owned by the municipality of Lubbeek. A calvary group - founded around 1860 out of devotion by the devout 't Serclaes family - adorns the hilltop. In 1992 the municipality installed three new statues. In a lower part of the forest, you can have a picnic at one of the tables or rest in the witches' circle, formed by a remarkable group of beech trees. Also behind the crucifix above you will find a picnic table and in front of it is a small bench. In a lower part of the forest, you can have a picnic at one of the tables or rest in the witches' circle, formed by a remarkable group of beech trees. You will also find a picnic table behind the crucifix above and a small bench in front of it. Source calvary group: https://www.rlnh.be/assets/images/rl-noordhageland/Publicaties%20-%20Aan%20de%20slag/05_RLNH_Lubbeek.pdf
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From Mollendaal up a treacherous cobblestone road that hurts the calves, but with a concrete gutter next to it. Continues to climb imperceptibly but steeply.
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The Tienen region offers diverse natural features. You can visit Lake Het Vinne, Flanders' only natural inland lake, known for its unique ecosystem and migratory birds. Another notable feature is the Thick Oak, a monumental tree over 300 years old with a circumference of more than 5 meters, located in the Mollendaalbos.
Yes, the region blends natural beauty with history. A prime example is Horst Castle, a 13th-century moated castle set in the green valley of the Wingebeek. While a man-made structure, its setting within a large pond and beautiful castle estate makes it a significant natural monument. Additionally, the Calvary forest features a calvary group on its hilltop, combining natural woodland with historical devotion.
The Tienen area is rich in forests. The largest mixed deciduous forest in Flanders, Meerdaal Forest and Heverlee Forest, covers 2050 hectares and is home to a variety of plants and the oldest deer population in Flanders. The Calvary forest is another beautiful beech forest, known for its 'witches' circle' of remarkable beech trees.
While not explicitly listed as 'hidden gems' in the data, the Paddepoel Nature Reserve – Rozendaalbeekvallei Pond near Vissenaken is highlighted for its immersive outdoor experience and moderate hiking loop. Bevingen Nature Reserve also offers serene walking paths, dense forests, and tranquil ponds, providing a peaceful escape.
Absolutely. The Tienen region offers diverse hiking routes. For example, you can find a moderate loop trail in the Paddepoel Nature Reserve – Rozendaalbeekvallei Pond. Many trails wind through rolling hills and showcase local natural heritage. You can explore more options on the Hiking around Tienen guide.
Beyond hiking, the Tienen area is excellent for other outdoor pursuits. You can find numerous running trails, such as the 'Ruins loop from Tienen' or the 'Running loop from Tienen'. Road cycling is also popular, with routes like the 'Racour Station – RAVeL Jodoigne cycle path loop from Tienen'. For more details, check out the Running Trails around Tienen and Road Cycling Routes around Tienen guides.
Yes, there are options for easier walks. For instance, the Lake Het Vinne provincial domain offers a range of possibilities for walking and discovering nature, including adventurous hiking trails but also accessible paths. The Hiking around Tienen guide lists an 'easy' rated 'Hiking loop from Tienen' of 6.5 km and 'Saint Margriete Church, Houtem – Memorial statue loop from Sint-Margriete-Houtem' of 4.3 km.
Many natural monuments in the Tienen region are family-friendly. Lake Het Vinne, for example, has a playground, play forest, sensory experience path, and visitor center. Meerdaal Forest and Heverlee Forest also offer the 'Path of Ad' with mysterious tree sculptures that children might enjoy. The Thick Oak provides a nice spot for a picnic in the shade.
Generally, dogs are allowed on the grounds of many natural areas. For instance, dogs are permitted on the castle grounds of Horst Castle, though not inside the castle itself. It's always best to check specific regulations for each location, especially regarding leash requirements, to ensure a pleasant visit for everyone.
While specific public transport routes to every natural monument are not detailed, the Tienen region is generally accessible. For example, the provincial domain of Lake Het Vinne is located close to the center of Zoutleeuw, suggesting reasonable accessibility. For other sites, it's advisable to check local bus schedules from Tienen to nearby villages, which often serve as starting points for exploring natural areas.
Yes, parking is generally available at key natural monuments. Horst Castle, for example, has parking facilities. For other natural areas like Meerdaal Forest or Lake Het Vinne, designated parking areas are typically provided for visitors. It's always a good idea to confirm parking availability and any potential fees before your visit.
The natural monuments around Tienen can be enjoyed year-round, but each season offers a different experience. Spring (March/April) is particularly beautiful when wood anemones bloom, especially around the Thick Oak. Summer provides lush greenery and ideal conditions for hiking and outdoor activities. Autumn brings vibrant foliage, while winter offers tranquil, crisp walks, though some facilities might have reduced hours.
Visitors appreciate the tranquility and natural beauty of the region. They enjoy the diverse landscapes, from rolling hills to dense forests and serene lakes. The blend of nature with historical sites like Horst Castle is also a highlight. Many find the areas perfect for relaxation, observing local flora and fauna, and engaging in physical activity amidst scenic backdrops.
Yes, you can find options for refreshments. Near Horst Castle, the Brasserie Wagenhuis offers a convenient stop for food and drinks. The provincial domain of Lake Het Vinne also has a visitor center, which often includes facilities for refreshments. Additionally, picnic opportunities are available at sites like the Calvary forest and near the Thick Oak.


Extend your search for the best caves by checking out these guides of the top ones around Tienen: