Longest caves in Normandy
The longest cave in Normandy in the EspeleoWorld catalogue is Grotte et carrière du Pylône (8,500 m), followed by Perte de l'Aure and Source de l'Orbiquet.
The longest cave in Normandy in the EspeleoWorld catalogue is Grotte et carrière du Pylône (8,500 m), followed by Perte de l'Aure and Source de l'Orbiquet.