An unspoiled site nearly half a kilometre in length, where the Séran has hewn out a succession of potholes linked by deep, narrow clefts in the rock down which roaring water cascades.

This site is part of 32 sites labeled Sensitive area in the Ain department.

A stone pavement forms a bridge over one deep pothole, providing access to the path to the former railway station of Vieu. The gorges are located close to the hamlet of Belmont, and are part of a hiking trail named Les gorges de Thurignin.

It is forbidden to bathe in the bed of the Séran and to picnic on the banks of the Séran.

Animals accepted on leash only.

Please note that the flow of the Séran river varies greatly over the seasons, it happens that the gorges can be dry during the summer.

• Pets welcome