Best attractions and places to see around Coisia, a village located in the Ain Valley at the confluence of the Jura and Ain departments in France. The area offers a variety of attractions that combine historical significance with natural beauty. Visitors can explore ancient ruins, unique geological formations, and culturally rich religious sites. Coisia is situated within the Jura Mountains, known for diverse landscapes.
Last updated: June 23, 2026
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Highlight • Religious Site
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The bridge separates two departments, the Jura and the Ain. "Iron bridge. For several centuries, the Ain was crossed at Thoirette by means of a ferry, known as the bac de Christouphe, the name of the commune where the passenger resided. From 1808 to 1811, the riparian communes clubbed together to build a bridge in place of this ferry. The project had been drawn up by Mr. Cordier, of Orgelet, an engineer then in charge of the direction of the Simplon road works. Various obstacles opposed the execution of this work. It was only in 1829 that an iron bridge was built, which collapsed in 1843. The department of Ain has just replaced it with an iron bridge currently open to traffic". Statistique de la France - 1855 - Ministère de l'Agriculture par Imprimerie Impériale à Paris - p53.
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You think of a castle but only stones - but still a fantastic view
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You think castle but only stones - But fantastic view
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worth cycling past
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From the ruins of Oliferne Castle, perched on a rocky spur in the Jura Mountains, you can enjoy breathtaking views of the Ain Valley and beyond. Once a medieval fortress, its ruined walls and towers now blend into the rugged landscape. Its strategic position allowed it to control access to the region, making it a must-see when hiking the Pic d'Oliferne.
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Nestled at the bottom of a valley, on the side of the road which goes from Bourg en Bresse to Oyonnax, this building is only clearly revealed nearby, on the GR, which runs alongside the enclosure. Drainages cut the path in several places, to a greater or lesser extent depending on the rainfall, but are designed to be passable. Access is easy, provided you are properly shod and covered depending on the season.
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An active water cave that is locked. Only the cavers have access here.
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Coisia and its surroundings are rich in history. You can explore the ruins of Oliferne Castle, a former medieval fortress offering panoramic views. Another significant site is the Church of Saint-Hymetière, an elegant example of early Romanesque monastic architecture built on a 6th-century priory. Additionally, the former Carthusian monastery, Chartreuse de Sélignac, now known as the Saint-Bruno house, is nestled in the valley of Sélignac.
Yes, the region boasts several unique natural features. A significant local attraction is the discovery of 148-million-year-old Dinosaur Footprints on a cliff face along the D60E road between Coisia and Arinthod. You can also visit Grotte de Corveissiat, an active water cave with a spectacular entrance, primarily accessible to cavers. The area is also part of the beautiful Jura Mountains and Ain Valley.
For breathtaking vistas, head to the Oliferne Castle Ruins. Perched at 807 meters above sea level, this spot offers panoramic views of the lakes and tree-covered mountains of the Jura region, including Lac de Coiselet and its surroundings. The road Along Lake Coiselet also provides scenic landscapes as it runs along the shore.
Families can enjoy exploring the historical Church of Saint-Hymetière, which is considered family-friendly. The Dinosaur Footprints near Coisia also offer an exciting and educational experience for all ages, providing a glimpse into ancient environments.
The region around Coisia is excellent for outdoor enthusiasts. You can find numerous routes for hiking, road cycling, and gravel biking. For hiking, consider trails like the 'Pic d'Oliferne Viewpoints Loop'. Cyclists can explore routes such as 'Cize Viaduct – Ain Valley loop' for gravel biking or 'Lac de Nantua – Lake Nantua loop' for road cycling. You can find more details on these activities in the dedicated guides for Hiking around Coisia, Road Cycling Routes around Coisia, and Gravel biking around Coisia.
Several hiking trails are available near Coisia, catering to various difficulty levels. A popular moderate trail is the 'Pic d'Oliferne Viewpoints Loop', which takes you to the Oliferne Castle Ruins. For an easier option, consider the 'View of Thoirette – Bois de Charrette loop from Thoirette-Coisia'. More hiking routes can be found in the Hiking around Coisia guide.
Towards the end of the 19th and early 20th centuries, the area was known for its thriving lime mines and kilns operated by Italian families. The remnants of these industrial buildings, known as Fours à Chaux (Lime Kilns), can still be observed on the departmental road between Thoirette and Arinthod, offering a glimpse into the region's industrial past.
Visitors particularly appreciate the stunning panoramic views from the Oliferne Castle Ruins, often noting the rewarding 360-degree scenery after a climb. The quiet and picturesque landscapes along Lake Coiselet are also highly valued for their beauty. The unique charm and historical significance of the Church of Saint-Hymetière also receive positive feedback.
Yes, the Grotte de Corveissiat is an active water cave in the area. While its entrance is spectacular, access inside is primarily restricted to cavers. Additionally, the Dinosaur Footprints on a cliff face along the D60E road offer a fascinating geological insight into the region's ancient past.
The Church of Saint-Hymetière is a remarkable example of early Romanesque monastic architecture. Built in the mid-11th century on the site of a 6th-century priory, its isolated location in the fields adds to its unique charm. It's notable for its original semi-circular vaulted nave and underwent a full rehabilitation in 2011.
Absolutely. The Coisia area offers diverse cycling opportunities. For road cyclists, routes like 'Cize-Bolozon Viaduct – Cize Viaduct loop' or 'Lac de Nantua – Lake Nantua loop' are popular. Gravel biking enthusiasts can explore options such as 'Cize Viaduct – Ain Valley loop'. Detailed routes and guides are available for Road Cycling Routes around Coisia and Gravel biking around Coisia.


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