Cascade de la Diomaz, Mountain waterfall in Mégevette, France

The Cascade de la Diomaz is a mountain waterfall in Haute-Savoie that descends in multiple tiers through steep terrain. The water flows past alpine meadows and forms a powerful series of cascades with natural pools along its course.

The waterfall marks the boundary between Mégevette and Bellevaux. It is reached from the Saint-Bruno chapel in the Val d'Enfer valley. The rock pools are called the Chartreux potholes, and a cross known as the Chartreux cross is carved into a stone at the foot of the falls.

The waterfall marks the boundary between Mégevette and Bellevaux, and its rock pools are called marmites des Chartreux, linking the site to the Carthusian monks of the Chablais. At its foot, a cross known as the croix des Chartreux is carved into one of the stones, a detail visitors can look for.

The waterfall sits on the Diomaz stream at the boundary of Mégevette and Bellevaux, reached by an easy walk from the Saint-Bruno chapel in the Val d'Enfer. The final approach crosses bare, moss-streaked rock that stays damp from spray, so grippy footwear helps. The stream below feeds the Brevon, which enters Lac de Vallon on its left bank.

The rock basins the water drops into are called marmites des Chartreux, "Chartreux potholes", after the monks of the Chartreuse order. A cross known as the croix des Chartreux is carved into one of the stones at the foot of the falls, easily missed among the wet rock.