Best natural monuments around Develier are found in the municipality of Develier, located in the canton of Jura, Switzerland. This region is characterized by its natural beauty, offering accessible natural sites. While Develier itself is a small commune, the immediate surrounding area provides diverse natural landscapes. These features include significant geological formations and bodies of water.
Last updated: September 30, 2026
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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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Imposing grotto and at the same time a place of pilgrimage. Here you should switch from the hiking trail near the bridge to the road and pause for a moment and enjoy the gentle coolness and refresh yourself with the water from the Karlsquelle (which is said to have healing powers). A small karst spring arises inside the cave. The water flows as a trickle from a stalagmite into a shallow basin. There is a crucifix under the entrance arch of the grotto, dedicated to Saint Columba of Sens, a 3rd century martyr. The place has been the destination of a pilgrimage on August 15th since the 13th century. The spring water is said to have miraculous healing powers. More: https://de.wikipedia.org/wiki/Grotte_de_Sainte-Colombe
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Lac Vert in Haute-Sorne is a small artificial lake located in the Jura mountains, formed by the Sorne river. It is surrounded by forests and pastures, and offers a beautiful emerald color due to the reflection of the trees. You can enjoy the scenery and the refreshing water of the lake, or continue to the Pichoux gorges for a longer hike. Lac Vert in Haute-Sorne is an ideal destination for trail runners who want to discover the Jura region.
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Lake Lucelle is the smallest in Switzerland and is located in a protected natural area near the French border. The trail around the lake is a comfortable and mostly flat 2km loop, with only 30m of elevation gain and loss. You can enjoy the view of the sparkling water, colorful vegetation and secluded houses on the other side of the lake. Whether you want to run fast or slow, Lake Lucelle offers a delightful experience for trail runners of all levels.
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Grotto in the rock with many thank you plaques.
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Impressive grotto and pilgrimage site. You should really stop here and enjoy the gentle coolness and fill your bottle with the water from the Karlsquelle (which is said to have healing powers). Inside the grotto, a small karst spring rises. The water flows as a trickle from a stalagmite into a shallow basin. There is a crucifix under the entrance arch of the grotto, which is dedicated to Saint Columba of Sens, a martyr from the 3rd century. Since the 13th century, the place has been the destination of a pilgrimage that takes place on August 15th. The spring water is said to have miraculous healing powers. More: https://de.wikipedia.org/wiki/Grotte_de_Sainte-Colombe
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Near Develier, you can explore a variety of natural features. The Green Lake, an artificial lake formed by the Sorne river, is known for its emerald color. The Lucelle Lake, Switzerland's smallest lake, offers a wild and romantic character with its reed-covered banks. You can also discover the Doubs river, which forms part of the border with Switzerland and features scenic sections.
Yes, the Grotto of Sainte-Colombe near Undervelier is a significant natural monument with a rich history. This impressive rock shelter has been a destination for Christian pilgrimages since the 13th century, with its spring water traditionally believed to possess healing powers. Archaeological excavations have also revealed prehistoric traces, adding to its cultural importance. You can find more information on its Wikipedia page: Grotte de Sainte-Colombe.
The Gorges du Pichoux, or Sorne Gorge, is a captivating natural monument carved by the Sorne River. It's known for its mystical beauty, with the river flowing alongside vertical limestone cliffs. A unique feature is the '1,000 springs' phenomenon on rainy days, where water shoots from the cliffs. At the back of the gorge, you'll find the 'Lac Vert' (Green Lake), a perfect spot for a picnic. The gorge offers a dramatic landscape for light hiking and nature walks, and is ecologically significant for a rare species of mayfly.
Several natural monuments around Develier are suitable for families. The Lucelle Lake offers a comfortable and mostly flat 2km loop trail, perfect for a leisurely walk. The Green Lake is also family-friendly, providing beautiful scenery and refreshing water. The Doubs river has sections with small beaches, ideal for a family outing.
The area around Develier offers various outdoor activities. You can find numerous hiking trails, including easy and moderate options like the 'Les Ordons loop' or 'Étang de Delémont loop'. For cycling enthusiasts, there are touring bicycle routes, such as the 'Gorges du Pichoux loop from Courtételle', and challenging gravel biking trails like the 'Saint-Ursanne Railway Viaduct – Doubs loop from Develier'. You can explore more routes in the hiking guide for Develier or the cycling guide for Develier.
Komoot users highly appreciate the serene beauty and tranquil atmosphere of the natural monuments. For instance, visitors describe Lucelle Lake as a place to 'unwind in nature and watch waterfowl'. The Grotto of Sainte-Colombe is noted for its 'gentle coolness' and being a 'romantic rock cave'. The Green Lake is praised for its 'beautiful emerald color' and being a 'very special natural experience'.
Visiting during warmer months allows for comfortable exploration of the lakes and gorges. The Grotto of Sainte-Colombe is particularly appealing in summer, offering a 'wonderfully cool' retreat. The Gorges du Pichoux are also beautiful during spring and autumn when the foliage changes or the springs are active.
Yes, several natural monuments offer excellent viewpoints. The Lucelle Lake and Green Lake are both categorized as viewpoints, providing picturesque scenes of the water and surrounding forests. Additionally, the 'Spectacular valley entrance' highlight, which refers to the entrance of the Birs Gorge, is noted for its impressive white limestone cliffs that are 'definitely worth a photo!'
While the Gorges du Pichoux are well-regarded, the phenomenon of '1,000 springs' on rainy days, where water geysers shoot from the cliffs, is a less commonly observed and truly spectacular natural event. The ecological significance of the gorge, hosting an extremely rare species of mayfly, also makes it a hidden gem for nature enthusiasts.
The region is rich in geological formations. The Gorges du Pichoux showcase dramatic limestone cliffs carved by the Sorne River. The Grotto of Sainte-Colombe is a large natural rock shelter with a karst spring and stalagmites. The 'Spectacular valley entrance' to the Birs Gorge also features impressive white limestone cliffs, demonstrating the powerful geological processes at play in the Jura canton.
While specific public transport details for each monument are not provided, the region around Develier is generally accessible. For detailed planning, it's recommended to check local public transport schedules for routes connecting to the villages nearest to the natural monuments, such as Undervelier for the Grotto of Sainte-Colombe or areas around the Gorges du Pichoux.


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