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France
Auvergne Rhône Alpes
Nantua

Samognat

Top 5 Natural Monuments around Samognat

Natural monuments around Samognat are characterized by diverse geological formations and aquatic features within the Ain department. The region encompasses significant natural areas, including river gorges, pristine lakes, and unique cave systems. These landscapes offer varied natural habitats and geological interest, shaped by both glacial activity and water erosion. The area provides opportunities to observe distinct natural environments.

Best natural monuments around Samognat

  • The most popular natural monuments is Lake Nantua, a lake that is a glacial lake backed by limestone cliffs. This lake is noted for its varying sapphire and emerald colors.
  • Another must-see spot is Lake Genin, a lake with alpine fir trees and turquoise waters. Visitors can expect a mountain lake setting, often referred to as "the little Canada of Haut-Bugey."
  • Visitors also love Grotte de Corveissiat, an active water cave. This cave is hidden in moss-covered woods and features a spectacular entrance.
  • Samognat is known for its lakes, gorges, and caves. The region offers a variety of natural monuments to see and explore, from glacial lakes to unique geological formations.
  • The natural monuments around Samognat are appreciated by the komoot community. These highlights have received 118 upvotes and feature 38 photos from visitors.

Last updated: June 19, 2026

Lake Nantua

Highlight • Lake

This glacial lake backed by limestone cliffs is sometimes sapphire and sometimes emerald in color - Alexandre Dumas wrote in his book Impression de voyage in 1834: “This pretty little sapphire blue lake set like a jewel, which nature fears to lose. »

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Lake Genin

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Nicknamed "the little Canada of Haut-Bugey", this mountain lake, with its alpine fir trees and turquoise waters, is an excellent mid-course break.

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Lac de Nantua

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Lake Nantua is of glacial origin and is 141 hectares. The limestone cliffs offer a magnificent contrast with the emerald or sapphire water, depending on the day. Alexandre Dumas described it in his books as “the pretty little sapphire blue lake held in like a jewel, which nature fears to lose”.

Bathing enthusiasts, this will be your favorite site in the region!

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Grotte de Corveissiat

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An active water cave that is locked. Only the cavers have access here.

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Chancia Viewpoint

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So many things to see from here! A beautiful view of Lake Coiselet and the Bienne valley. From here, you can also see the village of Chancia and the peak of Oliferne.

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Popular around Samognat

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Tips from the Community

Lucie
August 27, 2025, Lac de Nantua

Beautiful, simple, easy walk; lots of traffic noise on the "road" section, a bit of a shame, but the color of the water is magical

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unvara
April 14, 2024, Lac Genin

Viewpoint on Lake Genin.

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Alex Fox
March 3, 2024, Lac de Nantua

Natural jewel, sapphire blue or emerald green waters, nautical activities.

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kelafuti
January 3, 2024, Lac Genin

Wonderful place! There is a restaurant, ideal for a break

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Liese Lotte
September 19, 2023, Lac Genin

Small and cute

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An active water cave that is locked. Only the cavers have access here.

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PeterStar
July 22, 2023, Lac de Nantua

The northern part of the lake borders the village of Port.

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PeterStar
July 22, 2023, Lac de Nantua

The house lake of the city of Nantua.

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Frequently Asked Questions

What unique natural features can I explore around Samognat?

The region around Samognat is rich in diverse natural features. You can discover the dramatic Gorges de l'Oignin with its varied habitats, including tufa formations and the impressive Gorges du Val d'Enfer. There are also several beautiful lakes, such as Lake Nantua, known for its changing sapphire and emerald colors, and Lake Genin, often called the 'Little Canada of Haut-Bugey' due to its alpine fir trees and turquoise waters. Additionally, the area features unique cave systems like the Grotte de Corveissiat, an active water cave hidden in moss-covered woods.

Are there family-friendly natural monuments to visit near Samognat?

Yes, several natural monuments are suitable for families. Lake Genin offers supervised swimming, fishing, and tree climbing in summer, along with an interpretive trail about peat bog ecosystems. The Chancia Viewpoint provides stunning vistas over Lake Coiselet and the Bienne valley, which is enjoyable for all ages. The shores of Lake Nantua are also great for walks and picnics.

What kind of outdoor activities can I do near the natural monuments?

The natural monuments around Samognat offer a wide range of outdoor activities. The Gorges de l'Oignin are ideal for hiking and mountain biking, with trails like 'Le tour de l'Oignin à Samognat'. At Lake Genin, you can hike, mountain bike, fish, and even ice skate or cross-country ski in winter. For more structured routes, you can find various options for running, mountain biking, and road cycling in the area.

What is the best time of year to visit the natural monuments around Samognat?

The best time to visit depends on the activities you're interested in. Summer is excellent for hiking, swimming, and water sports at the lakes. Autumn offers beautiful foliage, especially around the forested areas. In winter, places like Lac Genin transform into a winter wonderland, perfect for ice skating, ice diving, cross-country skiing, and snowshoeing. Spring brings fresh greenery and pleasant temperatures for hiking.

Are there any historical or geological points of interest related to the natural monuments?

Yes, the region has fascinating geological and historical aspects. Lac de Sylans, for instance, was formed by a spectacular rock collapse in the Middle Ages and is famous for its historical Glacières de Sylans, where natural ice was harvested in the 19th century. Educational panels along a pathway detail this history. The Gorges de l'Oignin feature unique tufa formations, which are calcareous concretions formed by flowing water, showcasing ongoing geological processes.

Where can I find scenic viewpoints of the natural landscapes?

For breathtaking views, the Chancia Viewpoint offers expansive panoramas of Lake Coiselet and the Bienne valley. The shores of Lake Nantua also provide picturesque scenes, especially with its glacial lake backed by limestone cliffs. Mornings and late afternoons are often the best times for contemplation and photography around the lakes.

What makes the Gorges de l'Oignin a significant natural area?

The Gorges de l'Oignin are designated as a Sensitive Natural Area (ENS) due to their exceptional biodiversity and varied habitats. This 11-kilometer stretch of the Oignin river encompasses wetlands, Molinia meadows, alkaline low marshes, alder and willow swamps, dry grasslands, and low-altitude hay meadows. It's also notable for its tufa formations and the impressive Gorges du Val d'Enfer, making it a preserved sector of remarkable ecological value.

Can I visit the Grotte de Corveissiat, and what should I expect?

The Grotte de Corveissiat is an active water cave hidden in moss-covered woods. While its entrance is spectacular and a sight to behold, direct entry into the cave is generally restricted to cavers due to submerged sections and safety concerns. Visitors can admire the magical entrance from the outside.

Are there any natural monuments suitable for fishing?

Yes, fishing is a popular activity in the region. Lake Genin offers fishing opportunities. Additionally, Lac de Sylans is known as a paradise for pike fishers, with abundant pike, whitefish, carp, and bream in its exceptionally pure waters.

What is special about the Ox Cave?

The Ox Cave is notable for its grand entrance, featuring a 20-meter high overhang that resembles a magnificent palace. It's a striking geological formation that offers a unique visual experience for visitors exploring the natural monuments in the area.

What do visitors enjoy most about the natural monuments around Samognat?

Visitors frequently appreciate the stunning natural beauty and tranquility of the area. The changing colors of Lake Nantua, the 'Little Canada' atmosphere of Lake Genin, and the dramatic geological formations like the Gorges de l'Oignin are often highlighted. Many enjoy the opportunities for peaceful walks, scenic views, and diverse outdoor activities available year-round.

Are there options for dining or accommodation near the natural monuments?

Yes, particularly near some of the more popular sites. For example, an auberge (inn) at Lac Genin offers dining and accommodation options, allowing visitors to extend their stay and fully experience the area. More options can be found in nearby towns like Samognat or Oyonnax.

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

ChampfromierOyonnaxGironBelleydouxLe Poizat-LalleyriatÉchallonSaint-Germain-De-JouxMontangesPlagneMatafelon-GrangesChâtillon-En-MichailleLeyssardSerrières-Sur-AinCharixMontréal-La-CluseArbentPeyriatIzernoreDortanGroissiatMartignatApremontCeignesGéovreissetChalles-La-MontagneChanciaNurieux-VolognatBrionBilliatVillesSaint-Martin-Du-FrêneMaillatLabalmeBéard-GéovreissiatSonthonnax-La-MontagneBolozonBellignatBrénodCondamineJujurieuxPoncinSaint-AlbanPortOutriazChevillardVieu-D'IzenaveSaint-Jean-Le-VieuxBoyeux-Saint-JérômeCerdonLes NeyrollesChampdor-Corcelles

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