Best natural monuments around Port are found in a region characterized by diverse natural features. This area, often associated with maritime activities, also offers inland natural attractions. The landscape includes glacial lakes, limestone cliffs, and ancient geological sites. Visitors can explore a variety of natural formations that showcase the region's geological history and scenic beauty.
Last updated: July 2, 2026
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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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We tried the Arc'Aïk Battle for our fun day: it's awesome! Definitely worth doing! The refreshments offered by the organizers were a big plus (the EcoCUPs are very beautiful!).
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The dozens of footprints found at this site date back 150 million years. They correspond to traces of sauropods that lived in the Jurassic.
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Natural jewel, sapphire blue or emerald green waters, nautical activities.
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In the Magdalenian (17,000 to 14,000 years before present) the caves served as a shelter for prehistoric people. During the excavations, weapons, tools and bones came to light. Wikipedia.
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The Cerdon Caves are located in the French communes of Cerdon and Labalme, in the department of Ain in the Auvergne-Rhône-Alpes region. They house an archaeological site from the Magdalenian period. They are open to visitors for their speleological interest. Wikipedia
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The northern part of the lake borders the village of Port.
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Yes, several natural monuments around Port are excellent for families. Both Lake Nantua and the Cerdon Caves are noted as family-friendly. The Dinosaur Footprints of Villette offer a unique educational experience for all ages, while the Cascade de la Pisse Vache is accessible via a pleasant family walk through the forest.
Port offers natural monuments with significant historical and geological interest. The Cerdon Caves are an archaeological site where prehistoric people sheltered during the Magdalenian period, with weapons, tools, and bones discovered there. Additionally, the Dinosaur Footprints of Villette showcase traces of sauropods from 150 million years ago, offering a fascinating glimpse into the Jurassic era.
Absolutely. Many natural monuments around Port are perfect starting points for hikes. For example, you can find several routes around Lake Nantua, including easy and moderate loops. You can explore more options for hiking around Port, with routes ranging from 6 km to over 10 km.
Lake Nantua is a beautiful glacial lake, 141 hectares in size, known for its stunning color that shifts between sapphire and emerald. It is backed by dramatic limestone cliffs, creating a magnificent contrast with the water. It's also a popular spot for bathing enthusiasts.
When planning a visit to the Cerdon Caves, it's important to dress warmly. The internal temperature of the caves is consistently around 4°C, even in summer. The caves are open to visitors for their speleological interest and to explore the archaeological site.
Yes, there are various cycling opportunities near the natural monuments. You can find both road cycling routes and traffic-free bike rides around Port. Many routes incorporate scenic views of natural features like Lake Nantua and the surrounding landscapes.
The Dinosaur Footprints of Villette are unique because they preserve dozens of footprints from sauropods that lived 150 million years ago during the Jurassic period. Discovered in 2003, this paleontological site is of significant scientific interest, offering a rare window into ancient life.
Yes, the Cascade de la Pisse Vache is reached via a family-friendly walk. Starting from the hamlet of Bombois, a pleasant forest path leads to this waterfall, making it an ideal destination for an easy and scenic outing.
Visitors frequently praise the natural beauty and tranquility of the area. The contrasting colors of Lake Nantua against its limestone cliffs are often highlighted, with many enjoying walks and bathing. The historical depth of sites like the Cerdon Caves and the ancient Dinosaur Footprints of Villette also captivate those interested in history and geology.
Yes, several natural monuments offer excellent viewpoints. Lake Nantua is itself a magnificent viewpoint, with its glacial waters and surrounding cliffs. The Cascade de la Pisse Vache also provides scenic views within its forest setting.


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