Natural monuments around Oberlarg showcase the region's diverse natural environment, from ancient caves to river sources and notable trees. This commune in northeastern France is situated in the Alsatian Jura, offering a landscape characterized by limestone formations and waterways. The area provides insights into geological history and past human habitation, with several sites holding historical and ecological significance.
Last updated: August 13, 2026
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A lovingly furnished grotto for the little dwarves
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Added to the collection: komoot.com/de-de/collection/3600632/-naturdenkmaeler-besondere-baeume-und-weitere-schaetze-der-natur
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Idyllically situated at the end of the Lützeltal.
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While the prosperous times in the town of Lucelle are over, the Lac de Lucelle is a nature reserve that captivates with its peace, idyll and beauty. The lake can be easily walked around on a well-developed nature trail, and there are many benches where you can watch the ducks and fish in the lake.
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The Source du Doubs is a powerful karst spring in a heavily karstified area of the Jura Mountains. It is located near Mouthe, in the Haut-Jura Regional Nature Park, at an altitude of 937 m at the foot of the wooded, up to 1419 m high Mont Risoux mountain range, which marks the border between France and Switzerland. The Doubs rises from a cave in the rock from a small, approximately five-meter-deep spring basin. The spring discharges an average of 1740 litres per second and is the exit of a complex cave system with several siphons. The discharge can vary greatly. Several layers of rock can be distinguished on the rock above the spring. Below the spring, the river plunges down over a small waterfall. About two kilometers below the Source du Doubs, the approximately nine-kilometer-long Cébriot flows into the Doubs.
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At this point / I would like to quickly / say something about the source And specifically to quote the incomparable humorist Heinz Erhardt (1909 - 1979), who was known to a wide audience for his wit and "Another poem", with a short four-line line: "There is certainly a lot of beauty in the element, the wet. Because you can drink the water. But you can also - not." (H.Erhardt)
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The Largue has its source in Oberlarg at an altitude of 500 m, near the Swiss border, and flows into the Ill at Illfurth after traveling 46 km. In the 19th century, it provided energy for 53 mills spread across 34 villages.
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The rocks of the Grotte des Nains form an impressive gorge, approximately 25 meters high. According to legend, the little women of the earth lived here with the Erdmanala (little men of the earth). The gorge gives access to the Plateau des Nains and a beautiful view of the Ill valley.
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The region around Oberlarg is rich in geological formations. You can explore the impressive gorge of the Dwarves' Grotto, which is approximately 25 meters high and offers access to the Plateau des Nains with scenic views of the Ill valley. Additionally, the Grotte du Mannlefelsen features two rock shelters carved into the limestone foothills of the Jura massif, showcasing ancient human habitation.
Yes, several natural monuments hold historical importance. The Grotte du Mannlefelsen is a significant archaeological site with traces of human habitation dating back to the Ice Age. The Source de la Largue marks the origin of the Largue River, which historically powered 53 mills across 34 villages in the 19th century.
For families, Lucelle Lake is an excellent choice. It's a protected natural area with a comfortable, mostly flat 2 km trail around its perimeter, perfect for a leisurely stroll. The Source de la Largue is also family-friendly, offering a serene spot to experience the beginning of the river.
You can visit the Le Gros Chêne de Sondersdorf, also known as the big oak or Napoleon oak, which is estimated to be 400 to 500 years old. Additionally, west of the Ebourbettes farm, near the Swiss border, you'll find the Oberlarg Pasture Beeches, a group of five remarkably large, isolated beech trees, one of which is estimated to be 250 years old.
The area offers various outdoor activities. You can find numerous hiking opportunities, such as the 'Oberlarg and Morimont Castle' route or the 'Source de la Largue – Château du Morimont loop'. For more details on hiking trails, visit the Hiking around Oberlarg guide. Gravel biking and mountain biking are also popular, with routes like 'Franco-Swiss gravel outing in the Alsatian Jura' available in the Gravel biking around Oberlarg guide and MTB Trails around Oberlarg guide.
Yes, the Lucelle Lake is a protected natural area on the border with France, offering a tranquil setting. The Source de la Largue marks the beginning of the Largue River. Further afield, the Doubs river is also recognized as a natural monument, forming part of the French-Swiss border.
Visitors frequently appreciate the serene and wild character of places like Lucelle Lake, where they can unwind and observe waterfowl. The historical depth of sites like the Grotte du Mannlefelsen and the impressive rock formations of the Dwarves' Grotto are also highly valued for their unique appeal and scenic views.
The Dwarves' Grotto provides access to the Plateau des Nains, offering beautiful views of the Ill valley. The banks of Lucelle Lake, overgrown with reeds and trees, also offer picturesque views and a wild, romantic character.
Within Oberlarg, you can find the Source de la Largue, which is the origin of the Largue River. The village also features the Fountain Largue and Pond Largue, which contribute to its natural charm and offer pleasant spots for tranquility.
Many natural monuments are accessible via trails. For instance, Lucelle Lake has a comfortable 2 km loop trail. The Dwarves' Grotto is part of a trail that leads to the Plateau des Nains. You can find detailed information on various hiking, gravel biking, and mountain biking trails in the dedicated Komoot guides for the Oberlarg area.
While popularity varies, the Oberlarg Pasture Beeches, located west of the Ebourbettes farm, offer a peaceful and beautiful natural setting with ancient trees, often providing a quieter experience. The Source de la Largue also provides a serene spot away from larger crowds.


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