Best natural monuments in Vallée De L'Attert Natural Park are found within a diverse landscape situated between the Anlier forest and the Lorraine region's first cuesta. The park features varied environments, including sand quarries, marshlands, and five natural reserves. This region is characterized by its rich fauna and flora, offering a range of natural monuments and ecological sites. Its blend of natural heritage, forests, and meadows provides diverse exploration opportunities.
Last updated: June 27, 2026
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Popular around Vallée De L'Attert Natural Park
The core was worked out of the stone.
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nice place for a break in your ride. enjoy the nature ( all season)
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Nice reserve in a slightly marshy area.
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This must-see was a little sad during my visit. The pond does not seem to be maintained and the vegetation is taking over the footbridge as well as the small pontoon which was not passable. Too bad because this place can be very nice!
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This very pretty pond has a wooden bridge which allows you to observe the fauna and flora without disturbance. Road signs also indicate to slow down so as not to run over amphibians. It's funny.
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If you are looking for a peaceful and natural place, you should visit the Tattert-Thiaumont pond. This pond, formerly used for fishing, is today dedicated to fauna, flora and tranquility. You can walk around the pond and get to know the water inhabitants, woodland birds and beavers thanks to the information boards installed along the banks. You can also observe the abundant pond life from a wooden pontoon overlooking the water. It's a great place to exercise and get closer to nature.
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The Old Oak of the Anlier forest is a majestic tree whose age is estimated at more than 500 years and whose circumference exceeds 6 meters. It is located in a clearing near the village of Anlier, where there is also a small chapel and a picnic area. The Anlier forest is one of the largest and most diverse in Belgium. It is home to many species of birds, mammals and plants. You will enjoy the peaceful atmosphere and natural beauty of this place.
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The park offers a diverse range of natural features. You can visit the Tattert-Thiaumont Pond, a tranquil lake dedicated to fauna and flora, where you can observe abundant pond life from a wooden pontoon. Another significant site is the Nothomb Valley State Nature Reserve, which features a mosaic of wet meadows, beech forests, and unique megaphorbias.
Yes, the park is home to the majestic Great Oak of the Anlier Forest. This ancient tree is estimated to be over 500 years old with a circumference exceeding 6 meters, offering a glimpse into the region's long natural history.
The park is known for its varied geology. A notable example is The Dragon Rock, a fascinating rock formation that has been meticulously carved to resemble a dragon's head. Additionally, the Carrière de Tattert (Tattert Quarry), though not a highlight in this guide, reveals the region's marine past with quarries containing various fossils like ammonites and gryphaea.
Many natural monuments in the park are suitable for families. The Tattert-Thiaumont Pond is excellent for observing wildlife, and the Nothomb Valley State Nature Reserve offers easy trails through diverse habitats. The Great Oak of the Anlier Forest is also a popular spot with a nearby picnic area.
The Vallée De L'Attert Natural Park offers numerous opportunities for outdoor activities. You can find various hiking trails, such as the 'Nobressart: Between Lorraine & Ardenne Trail' or 'Thiaumont and Its Small Heritage Trail'. For cycling enthusiasts, there are road cycling routes like the 'Post Village – Habay-la-Neuve loop'. You can explore more options on the Hiking in Vallée De L'Attert Natural Park and Road Cycling Routes in Vallée De L'Attert Natural Park guide pages.
The park's diverse landscapes, including marshlands and forests, are beautiful year-round. Spring and summer are ideal for observing flora and fauna, especially in areas like the Marais de Grendel with its wetland biodiversity. Autumn offers vibrant foliage in the forest areas, while winter can provide a peaceful, serene experience, though some paths might be overgrown or require appropriate gear.
The Grendel Marsh is a less-visited sanctuary that offers a unique wetland experience. While it can be a bit challenging to find and paths may be overgrown, it's worth seeing for its specific wetland flora and fauna. Remember to bring mosquito repellent, especially during warmer months.
The Vallée De L'Attert Natural Park is rich in biodiversity. You can observe abundant pond life and woodland birds at Tattert-Thiaumont Pond. The Carrière de Tattert is known for supporting rare plant species, viviparous lizards, and solitary bees. The park is also home to symbolic species such as the common kite, common crane, and various orchids.
Yes, for easier exploration, the Tattert-Thiaumont Pond features a wooden pontoon for observing pond life. The Marais de Grendel also offers boardwalks, allowing visitors to explore its unique wetland ecosystem without disturbing the environment. Within the Nothomb Valley State Nature Reserve, you can find a wooden boardwalk through the megaphorbiaia.
The Nothomb Valley State Nature Reserve is special for its mosaic of habitats, including wet and dry meadows, beech forests, and megaphorbias. It is part of the Natura 2000 network, highlighting its ecological importance. Visitors can follow a path that crosses the Nothomb River and discover diverse vegetation, including reeds and meadowsweets, and even a border marker between Belgium and Luxembourg.
Yes, at the Tattert-Thiaumont Pond, information boards are installed along the banks to help you learn about the water inhabitants, woodland birds, and beavers. This allows for an educational experience while enjoying the natural surroundings.
When visiting the Grendel Marsh, be aware that paths can be overgrown, and it might be a bit difficult to find. Parking is not directly adjacent, so plan accordingly. The boardwalk starts at the border post, and it's advisable to bring mosquito repellent, especially during warmer months, to ensure a comfortable visit.


Extend your search for the best caves by checking out these guides of the top ones in Vallée De L'Attert Natural Park: