Cascade du Gros Hêtre is a small twinfall of appr. 10 meters high (single drop) near Eaux-Bonnes in the French Pyrenees.
The waterfalls of Gros Hêtre are located 2 kilometer east of Eaux-Bonnes along road d918. There is a small path to the right heading strait to the river, into the forrest (at a house) where the waterfall can be found.
I am not sure if you can park the car at the side road, but from there it is a 2 minute walk to cascade du Gros Hêtre.
Also along road d918 there is another, bigger, more impressive waterfall called cascade Gourette in Gourette.