Rinnende Mauer, Natural monument and spring in Molln, Austria.

Rinnende Mauer is a large spring in the Steyrschlucht gorge near Molln, where water emerges as a fine spray from a porous conglomerate rock face overhanging the river. The water seeps out along roughly 50 metres of the wall, about 5 to 7 metres above the river, and trickles down the dark, moss-covered rock onto a slope of pale gravel.

The Rinnende Mauer has been a protected natural monument since 1999. Its overhanging wall is geologically young, loose conglomerate rather than limestone, and rockfalls are frequent: from 2010 to early 2013 the gorge paths were closed for this reason. The spring emerges 5 to 7 m above the river along roughly 50 m of wall.

The spring has been a protected natural monument since 1999, not part of Natura 2000. Its name, "Rinnende Mauer", refers to the trickling wall of conglomerate. Alpine plants such as the hairy alpenrose and white hellebore grow here, carried down from higher source areas of the Steyr; power plants built in the 20th century cut off this supply of seeds.

The spring lies on the Molln side of the Steyr, just downstream of the mouth of the Krumme Steyrling, roughly level with Schloss Leonstein. The gorge paths were closed from 2010 to early 2013 because of rockfalls from the loose conglomerate; keep to the marked route and watch for falling stones.

The spray-fed rock face supports alpine plants such as the hairy alpenrose, dwarf alpenrose, Petergstamm and Jägerblut, carried down from the Steyr's upper catchments. Since power plants were built in the 20th century, this supply of seeds and fruits has been cut off, and the plants here are considered endangered.