Puy de Dôme — Volcanic Peak

The Puy de Dôme is the highest and most visited of the 80 extinct volcanoes that make up the Chaîne des Puys, rising to 1,465 metres above the Auvergne plain in the Puy-de-Dôme department of Auvergne-Rhône-Alpes. The summit, declared a UNESCO World Heritage Site in 2018 as part of the Chaîne des Puys–Limagne fault tectonic arena, commands a 360-degree panorama across the volcanic chain to the west and the plains of the Limagne basin to the east, with Clermont-Ferrand visible directly below. On the summit plateau stand the ruins of a Roman temple dedicated to Mercury, excavated in the 19th century; a reproduction of the temple interior is displayed in the visitor centre at the summit station. The Panoramique des Dômes is a cog railway that climbs from a base station near the Col de Ceyssat to the summit in approximately 15 minutes. Alternatively, the Chemin des Muletiers, a 5-km signed trail through volcanic woodland, ascends on foot in 1.5–2 hours. The summit station has a café, telescopes, and interpretive panels explaining the Chaîne des Puys. On clear mornings, the phenomenon of cloud inversion — a flat white sea of cloud filling the Limagne basin while the volcanic summits emerge above it — is visible from the top. This typically occurs from late October to February. The summit area and railway are subject to closure in high winds or lightning risk; check conditions at the base station before ascending.