The Jonas Caves represent an extraordinary troglodytic site carved into volcanic tuff cliffs near Saint-Pierre-Colamine in Puy-de-Dôme. Built primarily during the 10th century, the multilevel complex extends 500 meters along the cliff face with approximately 70 rooms distributed across five floors, originally sheltering up to 600 inhabitants. The site includes a chapel with exceptional 11th-century frescoes, a functional bakery with bread oven, administrative quarters, and numerous storage cavities. Originally inhabited from Celtic times through the French Revolution, the caves show evidence of use as both a feudal mansion and refuge during the Hundred Years War. Today open to the public, this remarkable medieval settlement offers unique insight into communal medieval life carved into stone.
