Cascade du Pis de Lastien or cascade de Lastien is an unknown but superb waterfall at the end of Vallée d’Ossèse, near Aulus les Bains, in the French Pyrenees. I really don’t know why this waterfall is unknown? Maybe because it isn’t very touristic, I don’t know.
From Aulus les Bains go west over road D8F until you see a sign for St Lizier d’Ustou (D38), turn left here and follow road D38 until the road get very narrow and you see a sign Ossèse 1 km, keep right here. At a few houses the road ends. From here you have to walk.
Go further south by food for 3 kilometer (40-50 minutes) until you reach the amazing Cascade du Pis de Lastien.
Cascade du Pis de Lastien is apr. 70-90 meters high and can be very powerful.