73630, Le Châtelard
Pissieu waterfall forms just downstream from a source into which most of the rainwater and snow-melt drains into off the Margériaz Plateau. It is created from a karst resurgence of water from the so-called "Vauclusian source";
Beneath the entrance to the source, a submerged underground network plummets to a depth of 50 metres before making its way back up towards the Margériaz Plateau. Up to now, 79km of underground networks have been identified under the Margériaz Plateau, including the 'Tanne du Cochon' network, which has an elevation difference of 825 metres between its starting point on the plateau and its resurgence at Le Pissieu. You can get to the waterfall either via the car park by the 'Pont sur le Nant d'Aillon' (bridge over the Nant d'Aillon river) on the road between the villages of Attilly and Le Villaret Rouge, via the swimming lake in Le Châtelard or via Les Iles du Chéran Outdoor Activities Centre car park. About 2h from Les Iles du Chéran Outdoor Activities Centre car park.