Best natural monuments around Oppens offer access to diverse natural landscapes in the Lake Geneva region of Switzerland. The area is characterized by its proximity to large bodies of water, significant nature reserves, and views of surrounding peaks. Visitors can explore a variety of natural features, from ancient stone formations to protected wetlands. This region provides opportunities to experience both geological wonders and rich biodiversity.
Last updated: June 26, 2026
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The Creux de Terre near Yverdon-les-Bains is an impressive karst sinkhole and also a significant nature reserve. The basin was formed by geological processes in which limestone sank, forming a funnel-shaped basin. Today, the area is home to moist meadows, ponds, small forests, and rich biodiversity. Amphibians such as frogs, toads, and newts find ideal living conditions here. Numerous bird species also breed or rest in the reserve. Walking trails with information panels lead through the basin and explain its geology, flora, and fauna. The Creux de Terre is easily accessible from nearby Yverdon.
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The menhirs of Clendy are over 6000 years old and are the most important Neolithic site in Switzerland. The place was a meeting place and the statue menhirs were worshipped here.
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Obligatory stop to admire the Grande Cariçaie reserve. The new observation tower, inaugurated in March 2018, offers visitors three floors to enjoy the panorama of the Grande Cariçaie and benefit from a new observation point at water level, dear to photographers. This architectural jewel is made of 100% Swiss wood. Since the end of May 2019, it has been equipped with dry toilets. At the end of the marsh trail, you will find a pontoon perfect for observation. A little corner of paradise from where you can observe the characteristic animals of the marsh. With binoculars, a camera, or just your sharp eyes, stay still, quiet, and watch. source: https://www.pronatura-champ-pittet.ch/fr/reserve-naturelle
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Exciting area that can also be easily reached on foot or by bike from Yverdon-les-Bains: https://www.teddy-b.ch/tipp-der-woche/menhire-von-clendy-yverdon-les- bains-vd-stein-time /
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Here, the pile of imperfect millstones left on the site by the grinders and the circular cuts in the quarry, still visible in the negative, bear witness to the mining activity on this site in Roman times. The quarry was discovered in 1943 when human bones were unearthed during municipal work. In 2018, the cantonal archaeology department cleaned the site, which was gradually covered with moss and earth: the traces of the cuts are clearly visible again. The six educational panels on the site provide information on the discovery of the site, the historical context of the region, the technique of millstone extraction, its use in Roman mills, the shell sandstone and its geology. Text: https://www.chemin-des-bles.ch/chavannes-le-chene.html, translated with www.DeepL.com/Translator
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Reserve with many ponds to observe birds and nature. There are a few birdwatching place and a pond to fish. Check the hiking highlights to find the view points.
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Nature Reserve composed by a few ponds. In one you can fish and other are ideal for birdwatching or to observe nature.
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45 stones from 6000 years ago can be observed close to Yverdon Beach.
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Visitors frequently enjoy the Menhirs of Clendy, an impressive megalithic complex with 45 ancient stones. The Creux de Terre Nature Reserve is also popular for its ponds and birdwatching opportunities. For panoramic views, the Champ-Pittet Observation Tower – Grande Cariçaie Nature Reserve offers an elevated perspective of the marshlands.
Yes, several natural monuments are suitable for families. The Menhirs of Clendy offer an engaging historical experience. The Creux de Terre Nature Reserve and the Champ-Pittet Observation Tower – Grande Cariçaie Nature Reserve are excellent for nature observation and easy walks, providing educational opportunities about local wildlife and ecosystems.
The natural monuments around Oppens, particularly within the Grande Cariçaie Nature Reserve, are rich in biodiversity. At the Creux de Terre Nature Reserve, you can observe various bird species and amphibians like frogs, toads, and newts. The Champ-Pittet Observation Tower provides an ideal spot to view characteristic marsh animals.
The region around Oppens offers diverse outdoor activities. You can find numerous hiking trails, such as the 'Neuchâtel Lake Wetlands – Menhirs of Clendy loop' which passes by the Menhirs of Clendy. There are also options for gravel biking and cycling. For more details on routes, explore the hiking guide, gravel biking guide, and cycling guide for Oppens.
Yes, the Menhirs of Clendy is a significant historical site. This prehistoric stone avenue, consisting of 45 menhirs and statue menhirs, is the most impressive megalithic complex in Switzerland, dating back 6000 years.
The natural monuments around Oppens can be enjoyed throughout the year. Spring and autumn offer pleasant temperatures for hiking and birdwatching, with vibrant flora and fauna. Summer is ideal for combining visits with activities around Lake Geneva. Even in winter, some areas, especially observation points, can offer unique, serene views, though conditions may vary.
For excellent panoramic views, visit the Champ-Pittet Observation Tower – Grande Cariçaie Nature Reserve. This tower provides an elevated perspective of the marshlands and is particularly popular among photographers and birdwatchers. The Observation Tower at Grande Cariçaie Nature Reserve is also highly recommended for bird lovers.
While specific cafes directly adjacent to every monument may be limited, the larger nature reserves like Grande Cariçaie often have visitor centers or nearby facilities. For example, the Champ-Pittet site offers amenities, and the new observation tower is equipped with dry toilets. Parking is generally available at main access points for these sites.
Visitors particularly appreciate the blend of natural beauty and historical significance. The opportunity to observe diverse wildlife, especially birds, at reserves like Creux de Terre, is a highlight. The unique experience of exploring ancient megalithic sites like the Menhirs of Clendy, and the panoramic views from observation towers, are also highly valued.
Yes, the broader region offers access to spectacular natural wonders. Lake Geneva, a short distance away, is one of Western Europe's largest lakes, offering stunning views, charming lakeside towns, and the UNESCO-listed Lavaux vineyards. Further afield in the Bernese Alps, the Jungfraujoch – 'Top of Europe' provides a unique high-alpine experience with the Aletsch Glacier, the longest glacier in the Alps, and panoramic views from the Sphinx Observatory.
The region around Oppens is characterized by its proximity to large bodies of water, particularly Lake Neuchâtel, and significant nature reserves. You'll find diverse natural features ranging from wetlands and ponds, as seen in the Creux de Terre Nature Reserve, to ancient stone formations like the Menhirs of Clendy, and elevated viewpoints offering expansive vistas over marshlands.


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