Top 13 Natural Monuments around Alle
Natural monuments around Alle showcase a diverse landscape, featuring significant geological formations, serene lakes, and notable rivers. The region offers opportunities to explore its natural beauty and rich biodiversity. These sites provide insights into the area's geological history and offer varied outdoor experiences.
Best natural monuments around Alle
- The most popular natural monuments is Lucelle Lake, a lake right on the border with France. It is the smallest lake in Switzerland and is located in a protected natural area. …
Last updated: April 28, 2026
Lucelle Lake
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Doubs
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Porrentruy Botanical Garden
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Source de la Largue
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La Fille de Mai Rock Formation
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Tips from the Community
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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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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La Fille de Mai is an amazing rock formation located near the village of Lucelle. This impressive monolith resembles a woman wearing a long dress and a hat. According to legend, she is a princess transformed into stone by a witch.
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In Lucelle you have the possibility to get supplies at the gas station. I didn't see anything to stop by. But I wasn't looking for it either. At the lake there are benches in the sun and in the shade. The fauna on the lake was rather sparse. The small stream with the tiny waterfall is quite picturesque. But the place is nice for a short rest and pause.
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Frequently Asked Questions
What are the most popular natural monuments around Alle?
Visitors frequently enjoy Lucelle Lake, known as the smallest lake in Switzerland and located in a protected natural area. Another favorite is the Doubs river, which features the impressive 27-meter high Saut du Doubs waterfall. The unique La Fille de Mai Rock Formation, an impressive monolith resembling a woman, is also highly appreciated.
Are there family-friendly natural monuments in the Alle region?
Yes, several natural monuments around Alle are suitable for families. Lucelle Lake offers a comfortable and mostly flat 2km loop trail, perfect for a leisurely stroll with children. The Doubs river also has a small beach area under trees, ideal for a family outing. Additionally, the Porrentruy Botanical Garden is a great educational and enjoyable spot for all ages.
What kind of geological features can I explore around Alle?
The region offers diverse geological attractions. You can visit La Fille de Mai Rock Formation, a striking monolith with a local legend. The Doubs river itself is a significant natural feature, known for its unique border status and the powerful Saut du Doubs waterfall. For those interested in the origins of rivers, the Source de la Largue provides insight into the region's hydrology.
What outdoor activities can I do near the natural monuments around Alle?
The area around Alle is excellent for various outdoor activities. You can find numerous hiking trails, including easy loops like the Porrentruy Castle Loop or more moderate routes like the Vendlincourt Pond trail. For cyclists, there are many MTB trails, such as the Col de Montvoie loop. Running enthusiasts can explore running trails like the Bois de Vaumacon Nord loop.
Are there any natural monuments with historical significance?
Yes, the Porrentruy Botanical Garden is one of the oldest of its kind in Switzerland, established in 1798. It's now part of the Nature Museum and showcases a rich history of plant collection. The Source de la Largue also has historical relevance, as the Largue river powered 53 mills across 34 villages in the 19th century.
What kind of wildlife can I expect to see at these natural sites?
At Lucelle Lake, you can observe various waterfowl such as ducks and gray herons, especially in the wild and romantic areas where reeds and trees grow. The protected natural areas around the lake provide a habitat for diverse flora and fauna.
Where can I see unique plant species in the Alle region?
The Porrentruy Botanical Garden is the ideal place to see a vast collection of unique plant species. It features over 600 local plant species from the Jura chain, along with more than 70 varieties of roses and 180 varieties of irises, creating a spectacular display when in bloom.
Are there any natural monuments that are also good viewpoints?
While not explicitly listed as a viewpoint, the trail around Lucelle Lake offers delightful views of the sparkling water, colorful vegetation, and secluded houses. The La Fille de Mai Rock Formation itself is a striking sight and offers a unique visual experience.
Can I find any waterfalls around Alle?
Yes, the Doubs river is home to the impressive Saut du Doubs, a 27-meter high waterfall. It's a significant natural attraction and a must-see for anyone visiting the region.
What do visitors particularly enjoy about the natural monuments in Alle?
Visitors appreciate the serene and wild character of places like Lucelle Lake, where they can unwind and observe nature. The unique geological formations, such as the La Fille de Mai Rock Formation, and the historical significance of sites like the Porrentruy Botanical Garden, also draw considerable interest. The diverse outdoor activity options, from hiking to mountain biking, are also highly valued.
Are there any natural monuments that are easy to access for a short visit?
The trail around Lucelle Lake is a comfortable and mostly flat 2km loop, making it an easy and quick visit. The Porrentruy Botanical Garden is also easily accessible and can be explored at a relaxed pace.
What is the significance of the Doubs river in the region?
The Doubs river is notable for forming part of the border with Switzerland. Uniquely, unlike most border rivers, the Doubs belongs entirely to France in this section, a result of historical treaties. It also features the spectacular Saut du Doubs waterfall.
Most popular attractions around Alle
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