Irreler Wasserfälle, Natural waterfall cascade in Prüm Valley, Germany

The Irreler Wasserfälle is a natural cascade in the Prüm Valley that flows over dark rocks in multiple stages, forming small pools along its descent. The falls sit in a densely forested setting where moss covers the rocks and creates a cool, damp environment throughout the gorge.

The Prüm cut a deep gorge into Luxembourg sandstone and Keuper clay and marl here; a rockfall during the last cold period dammed the river, and once the water overflowed, the softer clay was washed away, leaving hard boulders that now form only low steps. The July 2021 flood moved many of these boulders and largely destroyed the former rapids, along with the wooden tourist bridge; a new bridge 100 m downstream opened in September 2023.

The name "Wasserfälle" is misleading: the Prüm here forms only low steps over boulders of Luxembourg sandstone, not a true waterfall. The site is explained together with the Teufelsschlucht, a walkable rock cleft two kilometres southwest, at the nature park visitor centre above it.

Access is via the Irreler Wasserfälle circular trail, which features multiple viewpoints and requires sturdy footwear. The paths can be wet and slippery, so careful footing is necessary throughout your visit.

The "waterfalls" are actually rapids formed by a prehistoric rockslide: blocks of hard Luxembourg sandstone and soft Keuper marl once dammed the Prüm. After the barrier was overrun, the clays washed away and only low ledges remained. The July 2021 flood moved many boulders and largely erased the old rapids; a new wooden bridge opened 100 m downstream in September 2023.