Best natural monuments around Sillingy are found in the Haute-Savoie region of France, offering a diverse natural landscape. The area is characterized by its geological features, including the significant Mandallaz mountain and the unique Sillingy Fault Mirror. These sites provide opportunities to explore natural heritage and observe diverse ecosystems. Sillingy's natural environment serves as a "green lung" for the surrounding communities, making it a notable destination for outdoor enthusiasts.
Last updated: July 2, 2026
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The most beautiful panorama but impressive and calm
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Very nice hike to do again
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Here lived free from May 12 to August 19, 1944 the maquisards of the secret army of the Megevant group, called "PAN PAN". A little history, even during a mountain bike outing, doesn't hurt!
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The Vuache Fault mirror is an easy to access but impressive site that is well worth a little detour!
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It’s beautiful… but not really passable by bike except mountain bike. It’s a gravel/stone path which, without big suitable tires, will make you skid.
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The place is perfect to admire Annecy and the Montagne d'Âge. It is the opportunity to make a last stop before returning to the city.
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This stone bridge dates from 1721, and allows you to admire the Fornant, as well as huge pots of giants. These cavities dug in the limestone rock are really surprising!
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Sillingy is home to several remarkable natural monuments. The Sillingy Fault Mirror is a geological marvel, considered one of Europe's most important fault mirrors, showcasing tectonic plate movement. Another must-see is Fier Gorge, where the river has carved a deep ravine through limestone, offering a unique catwalk experience. For panoramic views, visit Belvédère de la Grande Jeanne, which provides stunning vistas of Annecy and Lake Annecy.
Yes, both Fier Gorge and Belvédère de la Grande Jeanne are considered family-friendly. Fier Gorge offers an accessible catwalk experience with educational panels, while the Belvédère provides beautiful, easy-to-enjoy views for all ages.
Sillingy is particularly renowned for its geological significance. The Sillingy Fault Mirror is a prime example, illustrating the effects of rock slippage and mountain movement from the active Vuache fault. This site, rediscovered after a 1996 earthquake, is one of Europe's largest fault mirrors, with interpretive panels explaining its history and tectoglyphs. You can also see impressive limestone formations at Fier Gorge and the 'pots of giants' at Pont de Pissieu.
The Sillingy area offers a variety of outdoor activities. You can explore numerous hiking trails, including routes around the Mandallaz mountain and the Puits de l'Homme marshes. For detailed hiking options, refer to the Hiking around Sillingy guide. There are also gravel biking opportunities, with routes like the 'Sillingy Fault Mirror – Épagny Metz-Tessy loop'. Discover more in the Gravel biking around Sillingy guide.
Yes, the Resistance shelter 1944 is a natural cave that also serves as a historical site. It was used by the maquisards (French Resistance fighters) of the Megevant group from May to August 1944, offering a glimpse into the region's wartime past.
For Fier Gorge, the site is typically open from March 15 to October 15. Generally, spring and autumn offer pleasant temperatures for exploring the natural sites and hiking trails, with lush greenery in spring and vibrant colors in autumn. Summer is also popular, but can be warmer and more crowded.
The area around the Sillingy Fault Mirror is a Sensitive Natural Area (ENS) with rich biodiversity. Visitors might spot kestrels, black woodpeckers, green lizards, green and yellow snakes, and a multitude of butterflies. With a bit of luck, you might even encounter chamois.
Yes, there is an entrance fee for Fier Gorge. The other natural monuments mentioned, such as the Sillingy Fault Mirror and Belvédère de la Grande Jeanne, are generally freely accessible.
The Sillingy Fault Mirror is accessible from the Hameau de la Petite Balme. While the path leading to it is a gravel/stone path, which might not be ideal for all types of bikes, it is generally accessible for walkers. Interpretive panels are installed on-site to enhance the visitor experience.
Visitors frequently highlight the unique geological insights offered by the Sillingy Fault Mirror, appreciating the educational panels and the chance to see evidence of tectonic activity. The dramatic scenery and the catwalk experience at Fier Gorge are also highly praised. Many also enjoy the panoramic views from Belvédère de la Grande Jeanne, especially at sunset.
Yes, the region around Sillingy, including the Mandallaz mountain, offers opportunities for mountain hiking. You can find challenging routes with views of the Aravis and Bauges. For more information on specific trails and difficulties, consult the Mountain Hikes around Sillingy guide.
Absolutely. Many natural monuments, like the Sillingy Fault Mirror, are integrated into longer hiking routes. For instance, the 'Tête de la Mandallaz – Sillingy Fault Mirror loop from Sillingy' is a moderate 11.7 km hike that allows you to experience the geological site as part of a broader natural exploration. You can find more such routes in the Hiking around Sillingy guide.


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