Pont du Diable, 18th-century stone arch bridge in Thueyts, France

Pont du Diable is a single-arch bridge of rough light-coloured basalt masonry over the Ardèche, 17 m above the water, with a flat deck and a low parapet. Its basket-handle arch springs from the rocky slopes of the gorge at the foot of Thueyts. It now serves as a footbridge.

The bridge's completion works date from the 18th century, not the Middle Ages. It was built as a pedestrian footbridge over the Ardèche, 17 m above the river, using the local basalt stone of the upper Ardèche valley. The site lies within the ZNIEFF type I Upper Ardèche Valley and the Monts d'Ardèche Regional Natural Park.

Legend says the devil built the bridge so the villagers of Thueyts could reach the far bank for their guilty loves; many slipped into the gorge and never returned. On windy days their laments and cries of repentance are said to mix with the roar of the Ardèche. The bridge is now a pedestrian footbridge.

The bridge is a pedestrian footbridge over the Ardèche, 17 m above the water, with a 1.2 m parapet. The river can swell suddenly during Cévenol storms, so check conditions before descending. The site lies within the Upper Ardèche Valley ZNIEFF and the Monts d'Ardèche Regional Natural Park.

The bridge sits at the base of a massive basalt flow from the Gravenne volcano and forms part of the Monts d'Ardèche Regional Natural Park. This volcanic setting makes it a rare spot where medieval construction and ancient geological forces are directly visible together.