Chaîne des Puys UNESCO — 80 sleeping volcanoes

Your journey begins at the Maison du Site du Puy de Dôme, near Clermont-Ferrand, an ideal starting point to explore this Grand Site de France. The Puy de Dôme, culminating at 1,465 meters, is the giant of the Chaîne des Puys, inscribed on UNESCO World Heritage list in 2018. This viscous lava dome, formed between 15,000 and 9,200 years BCE, houses the remains of the Temple of Mercury, a circular Gallo-Roman edifice from the 2nd century AD dedicated to the god Mercury. Walking on the Sentier des Muletiers or taking the Panoramique des Dômes, you feel the strength of a volcanic alignment of 80 volcanoes over 45 km long and 3 to 5 km wide.

Continue towards the Puy Pariou, one of the most emblematic monogenetic volcanoes of the Auvergne Volcanoes Regional Natural Park. Its perfect horseshoe-shaped crater is a typical scoria cone of the region. Dated between 95,000 and 8,400 years BCE, it is little eroded and testifies to a brief and powerful eruption. This freely accessible site illustrates the geological richness of Auvergne-Rhône-Alpes and its place within this alignment of 80 volcanoes stretching 32 to 45 km long and 4 km wide, offering a concrete perspective on world heritage.

The Puy de Lemptégy, an open-air volcano, offers a unique immersion into the earth's core. This geological site, exposed by pozzolan mining, allows direct observation of volcanic strata and chimneys. It is a recent monogenetic volcano in the Chaîne des Puys, part of the youngest volcanic complex in mainland France, formed between 95,000 and 8,400 years ago. Its observation forecourt, mixed free and paid, is a key step to understanding the unique alignment of volcanoes over 32 km long and 4 km wide, a fundamental aspect of the history of Clermont-Ferrand and its region.

Nearby, the twin Puys de la Vache and de Lassolas are the most recent in the Chaîne des Puys, with eruptions dated around 8,400 years BCE. These scoria cones, formed during brief eruptions, are considered dormant. They represent a striking example of monogenetic volcanoes within this alignment of 80 volcanoes that characterize the landscape of Auvergne-Rhône-Alpes. Their free access allows direct exploration of these volcanic forms that have shaped the region's natural heritage, offering a fascinating stroll a few kilometers from Clermont-Ferrand.

To conclude your geological exploration, Lac Pavin, a circular volcanic maar formed by a phreatomagmatic explosion, offers a striking contrast. Its lake circuit path invites contemplation of a crater transformed into a deep lake, another example of the diverse volcanic forms of the Chaîne des Puys. Although the Notre-Dame Basilica of Orcival, a 12th-century Romanesque basilica classified as a historical monument, is not directly volcanic, its local stone and ancient architecture bear witness to human capacity to anchor itself in this landscape shaped by the forces of nature, extending the history of Clermont-Ferrand and its heritage.