On the road to Gourette, the sound of water may interest some passersby. The cascade of “Gros Hêtre” at the end of the promenade of Iscoo is a place imbued with freshness. From a height of about ten meters, its cold waters plunge noisily into the groove of Valentin. It is an ideal place to rest and recharge. Approach Time 2 min. History: In 1845, Paul Huet stayed in the Ossau Valley, he went to the Eaux-Bonnes with his friend Eugene Delacroix and makes a watercolor that is named "cascade du Gros Hêtre".