The Puy de Dôme is an ancient volcano which gave its name to the eponymous department. At the height of 1,465 metres above sea level, it is the highest volcano in Chaine des Puys, a volcanic complex of 80 volcanoes.A TDF antenna has become the symbol of the site and makes it very easy to identify. Also, at its summit, is a Gallo-Roman temple dedicated to Mercury. While the bravest can make the ascent on foot, a rack and pinion train gives access to the summit.