Cascade du Nideck, Waterfall near Oberhaslach, France.

Cascade du Nideck is a waterfall at the entrance to the Bruche Valley in the Vosges massif, on the commune of Oberhaslach in the Bas-Rhin, just south of the ruins of Nideck Castle. A narrow stream drops from the top of a tall, steep cliff of dark grey and brown stone broken into jagged, blocky ledges, spreading over the uneven rock and splitting into several smaller cascades that tumble over dark boulders at the base. Green moss and small plants grow on the wet rock beside the falling water.

Cascade du Nideck lies just south of the ruins of Nideck Castle, a medieval fortress in the Vosges massif above Oberhaslach. The waterfall sits at the entrance to the Bruche Valley, below the castle rock. The castle ruins above the falls are what remains of that stronghold, and the site is reached from the forestry house on the valley road.

The site is tied to regional folklore about giants who inhabited the neighboring Nideck castles in ancient times. These stories still shape how locals and visitors perceive this forested area.

The waterfall is reached via a marked trail of roughly 1.3 kilometers from the forestry house, with two parking areas available for visitors. The path is easy to follow but can be slippery in sections, especially when wet.

The waterfall sits at the entrance to the Bruche Valley, just south of the ruins of Nideck Castle, on the territory of Oberhaslach in the Bas-Rhin. Visitors walking up from the valley therefore pass the cascade before reaching the castle remains above it.