Best natural monuments around Fontaine-Chaalis are found within the Oise-Pays de France Regional Natural Park, offering diverse landscapes and geological interests. The area is characterized by extensive forests, including Ermenonville and Halatte, which provide a variety of natural features. Visitors can explore 6 natural monuments that showcase the region's unique ecological and historical heritage. These sites offer opportunities for nature observation and appreciating the local environment.
Last updated: July 5, 2026
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From this summit you can enjoy a panoramic view of the surrounding countryside and the Halatte forest. You can also discover the historical and cultural heritage of the region, such as the ruins of the Aumont castle and the Saint-Martin chapel.
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The Jean-Jacques Rousseau park in Ermenonville is a beautiful example of a landscaped garden, inspired by the paintings of Poussin and Claude Lorrain. There you can admire ponds, meadows and groves, as well as small buildings evoking different virtues, values or characters. The park is named after the philosopher Jean-Jacques Rousseau, who spent the last six weeks of his life there and was buried on Île des Peupliers. You can follow in his footsteps and meditate on his writings, engraved on certain ruins. The park is also a place of literary pilgrimage, as many famous writers and artists have visited it over the centuries. You can enjoy the tranquility and harmony of nature in this park, which is open Tuesday to Sunday, from 11 a.m. to 5:30 p.m.
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The Pierre Glissoire is a sandstone slab in the middle of which is a natural slide. According to legend, women used it to predict whether they would have children in the coming year.
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The Jean-Jacques Rousseau Park in Ermenonville is a beautiful example of a landscaped garden, inspired by the paintings of Poussin and Claude Lorrain. You can admire ponds, meadows and groves, as well as small buildings that evoke different virtues, values or characters. The park is named after the philosopher Jean-Jacques Rousseau, who spent the last six weeks of his life there and was buried on Île des Peupliers. You can follow in his footsteps and meditate on his writings, engraved on certain ruins. The park is also a place of literary pilgrimage, as many famous writers and artists have visited it over the centuries. You can enjoy the tranquility and harmony of nature in this park, which is open from Tuesday to Sunday, from 11:00 a.m. to 5:30 p.m.
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The ponds of Commelles are part of the beautiful forest of Chantilly and therefore of the Regional Natural Park Oise-Pays de France It is a protected site, rich in biodiversity, with thousands of frogs in March. In the 19th century, the ponds were frequented by romantic artists and authors such as Chateaubriand.
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Here we find a quite astonishing sandy mound in the middle of the forest! A small dune of Pilat in the middle of the Halatte forest. On your mountain bikes!
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Small detour for nature lovers in the forest of Pontarmé. This remarkable tree, the Chêne des Grès, is a sessile oak 23 meters high, about 300 years old. It shines in the middle of this forest and is worth a look!
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The region around Fontaine-Chaalis is notable for its unique geological formations, particularly sandstone outcrops. You can discover sites like La Pierre Glissoire, a sandstone slab with a natural slide, and the broader areas of La Pierre Sorcière and Les Grès Sainte-Marguerite in the Ermenonville forest massif, which showcase sandstone blocks and sandy stretches, remnants of a tropical sea from the Tertiary Era.
The Oise-Pays de France Regional Natural Park, encompassing Fontaine-Chaalis, is a protected green space spanning over 20,000 hectares. It features extensive wooded sections with ancient trees like oaks, beeches, and hornbeams, alongside diverse environments such as calcareous grasslands, moors, and wetlands. This variety supports local wildlife including roebuck, foxes, badgers, and owls, creating a rich tapestry of forests, rivers, ponds, and meadows.
Yes, several natural monuments are suitable for families. Étangs de Commelles, with its serene environment and rich wildlife, is a protected site within the Chantilly forest that families can enjoy. Additionally, La Pierre Glissoire, a natural sandstone slide, offers a fun and unique experience for children. The Jean-Jacques Rousseau Park also provides a beautiful landscaped garden with ponds and groves, perfect for a family outing.
Many natural monuments in the area are intertwined with history. Étangs de Commelles historically attracted romantic artists and authors like Chateaubriand in the 19th century. Butte d'Aumont allows visitors to discover the historical heritage of the region, including castle ruins and the Saint-Martin Chapel. The Jean-Jacques Rousseau Park is a significant historical site where the philosopher spent his last weeks and is buried.
The area offers a variety of outdoor activities. You can find numerous hiking trails, such as the 'Ermenonville Castle – Chaalis Abbey loop' or the 'View from the treetops – The Sorcerer's Stone loop'. Cycling is also popular, with routes like 'Le château d'Hérivaux — loop from Ermenonville' and 'Chaalis Abbey Loop'. For more options, explore the hiking guide or the cycling guide for Fontaine-Chaalis.
Fontaine-Chaalis is situated at the edge of the vast Forêt d'Ermenonville, which is part of the larger 'Trois Forêts' massif, including Chantilly and Halatte forests. These forests are characterized by Scots pines and unique sandy moors, offering extensive trails and a tranquil atmosphere for nature exploration.
The natural monuments around Fontaine-Chaalis offer beauty throughout the year. Spring, particularly March, is vibrant at Étangs de Commelles with thousands of frogs. The forests, like Ermenonville, are ideal for nature getaways in spring and autumn when the foliage is particularly striking. Summer provides pleasant conditions for hiking and exploring, while winter can offer a serene, quiet experience.
Yes, Butte d'Aumont is a natural monument that provides panoramic views of the surrounding countryside and the Halatte forest. It's an excellent spot to appreciate the expansive natural landscape of the region.
The diverse environments within the Oise-Pays de France Regional Natural Park, including forests, wetlands, and grasslands, support a variety of wildlife. Visitors might spot roebuck, foxes, badgers, and various bird species, including owls. The Étangs de Commelles are particularly known for their rich biodiversity, especially thousands of frogs in March.
Visitors frequently appreciate the tranquility and natural beauty of the area. The rich biodiversity, especially at sites like Étangs de Commelles, is a highlight. The panoramic views from Butte d'Aumont and the unique geological formations like La Pierre Glissoire also receive high praise. The historical connections and the opportunity for peaceful walks through ancient forests are also highly valued by the komoot community.
Yes, the region is home to remarkable trees. For instance, The Chêne des Grès, a sessile oak approximately 300 years old and 23 meters high, stands out in the forest of Pontarmé and is well worth a visit for nature lovers.


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