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Ile-de-France

Briis-Sous-Forges

Top 6 Natural Monuments around Briis-Sous-Forges

Best natural monuments around Briis-Sous-Forges are found within the Parc Naturel Régional de la Haute Vallée de Chevreuse, an area known for its preserved wooded and agricultural spaces. This region offers a variety of natural sites, from ancient quarries to significant cave systems and old-growth forests. The landscape provides numerous opportunities for outdoor activities and appreciating local flora and fauna. Its location within a regional natural park highlights its ecological importance and commitment to preserving its natural heritage.

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Last updated: May 24, 2026

La Troche Quarry

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The Troche quarry is today located in the very heart of the Eugène Chanlon Municipal Park, in Orsay-Palaiseau, in the Lozère (Palaiseau) district.
This is an old sandstone quarry, traces …

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The Oak of Petit Launay

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The “Petit Launay” oak (the aulnoye), remarkable for its size and the distribution of its branches, seems to date back to the 15th century.
The organizers of the Universal Exhibition …

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The 11 Remarkable Oaks of Méridon Forest

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They line the Vossery wood hiking trail

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On the Véloscénie, magnificent path leading to just opposite the Barn.

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The Caves of Sermaise

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The 3 cellars of Sermaise constitute the most important Essonne site for the hibernation of chiroptera. Indeed 6 different species of bats have been observed

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Harquin
June 9, 2024, Carrière de la Troche

In the morning, the rocks show blue reflections.

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The “Petit Launay” oak (the aulnoye), remarkable for its size and the distribution of its branches, seems to date back to the 15th century. The organizers of the Universal Exhibition of 1900 in Paris wanted to transport it to the capital, which attests to the interest that this Tree already presented. Mr Grisier, mayor of Bures and owner of “Petit Launay” fortunately declined this offer. This estate, a former stronghold from the 14th century, has been better known, since 1810, under the name of "The Virgin". A statuette is still visible on the surrounding wall of the property. It is crossed by the Vaularon, a tributary of the Yvette, hence the humidity conducive to the growth of alders. This tree has been classified in the list of “venerable trees in France”.

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Listed among the major geological sites since 2007, this former sandstone quarry offers a nice setting for running between rock and sand. The hue of the stone also earns it the name "Blue Rocks".

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The 3 cellars of Sermaise constitute the most important Essonne site for the hibernation of chiroptera. Indeed 6 different species of bats have been observed

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Very nice path but sandy in places. It was complicated with 32 tires but it was worth it.

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Sometimes sandy and slippery

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They line the Vossery wood hiking trail

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On the Véloscénie, magnificent path leading to just opposite the Barn.

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Frequently Asked Questions

What unique natural features can I explore around Briis-Sous-Forges?

Briis-Sous-Forges, situated within the Parc Naturel Régional de la Haute Vallée de Chevreuse, offers a diverse range of natural features. You can explore ancient quarries like La Troche Quarry, significant cave systems such as The Caves of Sermaise, and remarkable old-growth trees like The 11 Remarkable Oaks of Méridon Forest. The area also features well-maintained ponds, woods, and extensive wooded paths.

Are there family-friendly natural monuments around Briis-Sous-Forges?

Yes, several natural sites are suitable for families. La Troche Quarry, located within the Eugène Chanlon Municipal Park, offers landscaped trails and picnic tables. The 11 Remarkable Oaks of Méridon Forest provide an engaging walk among ancient trees. Additionally, the Oak of Petit Launay is a notable tree that can be visited. The numerous wooded paths and ponds like Étang des Aulnettes are also great for family strolls.

What kind of outdoor activities can I do near these natural monuments?

The region around Briis-Sous-Forges is excellent for various outdoor activities. You can enjoy hiking on the many marked trails within the communal forest and other wooded paths. Cycling is also popular, with options like the Gravel Trail of the Haute Vallée de Chevreuse. For more structured routes, you can find numerous hiking routes, road cycling routes, and MTB trails in the area.

Are there any historical aspects to the natural sites in Briis-Sous-Forges?

Yes, some natural sites have historical significance. La Troche Quarry, for instance, has a documented history of exploitation since 1720 and was mentioned in Napoleon's land registers. Bois de la Garenne, a larger wood in the area, historically served as a hunting reserve and contains older structures, including a substantial stone wall dating from before 1800.

What makes the natural monuments in Briis-Sous-Forges special?

The natural monuments in Briis-Sous-Forges are special due to their location within the Parc Naturel Régional de la Haute Vallée de Chevreuse, emphasizing their ecological importance and commitment to preservation. They offer a blend of geological interest, such as the former sandstone quarry at La Troche Quarry, and significant biodiversity, like the bat habitats in The Caves of Sermaise. The presence of ancient, protected trees like The 11 Remarkable Oaks of Méridon Forest also adds to their unique charm.

Can I find easy walks or trails suitable for all fitness levels?

Yes, the area provides many options for easy walks. The communal forest and various wooded paths offer marked trails that are generally suitable for leisurely strolls. Étang des Aulnettes and Bois Croulard are appreciated places for walks, providing serene landscapes. For specific routes, you can find easy hiking options around Briis-Sous-Forges.

What kind of wildlife can I expect to see in the natural areas?

The natural areas around Briis-Sous-Forges, particularly within the Parc Naturel Régional de la Haute Vallée de Chevreuse, are rich in biodiversity. Ponds like Étang des Aulnettes serve as important habitats for local wildlife. The Caves of Sermaise are a crucial site for the hibernation of six different bat species. The woods and forests, such as Bois Croulard and Bois de la Garenne, also support a variety of local flora and fauna.

Are there any notable ancient trees in the region?

Yes, the region is home to several remarkable ancient trees. The 11 Remarkable Oaks of Méridon Forest are a collection of 200-year-old trees classified as remarkable and protected. Additionally, The Oak of Petit Launay, dating back to the 15th century, is notable for its size and branch distribution and is classified among the 'venerable trees in France'.

What do visitors enjoy most about the natural sites in Briis-Sous-Forges?

Visitors particularly appreciate the tranquility and natural beauty of the area. The preserved wooded and agricultural spaces offer a peaceful escape. Sites like La Troche Quarry are enjoyed for climbing and relaxation, with landscaped trails and picnic areas. The ancient trees and diverse trails provide opportunities for both active exploration and quiet contemplation of nature.

Are there any specific geological formations to observe?

Yes, La Troche Quarry is a significant geological site. It is a former sandstone quarry, recognized since 2007, featuring a 5-meter high working face. The sandstone found here, known as Fontainebleau sandstone, formed around 30 million years ago during the Quaternary era. The quarry's stone is also referred to as 'Blue Rocks' due to its hue.

Can I go cycling or mountain biking near the natural monuments?

Absolutely. The region offers excellent opportunities for cycling and mountain biking. The Gravel Trail of the Haute Vallée de Chevreuse is a popular route. You can find a variety of road cycling routes and MTB trails that traverse the natural landscapes, including woods and agricultural spaces, providing diverse terrain for riders.

Are there any caves or underground features to explore?

Yes, The Caves of Sermaise are a notable underground feature. This cave system is recognized as the most important site in Essonne for the hibernation of chiroptera, with six different bat species observed there. While access might be restricted to protect the bats, it represents a significant natural monument in the area.

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Extend your search for the best caves by checking out these guides of the top ones around Briis-Sous-Forges:

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