South of the city of Pegnitz, the Pegnitz River flows in a valley loop around the Wasserberg. On the northern slope of the mountain, the river releases some of its water into fissures in the brittle limestone and into a ponor cave at the Röschmühle. The cave forms a branched corridor system in the layered, highly fissured and brittle limestone. After a good 300 m as the crow flies, the river emerges again on the southern slope of the water mountain.
In order to find out the secret of the karst miracle, ducks were once chased into the mountain, which are said to have emerged again after some time from a spring cave on the southern slope of the mountain.
Even tracer tests and hydrochemical studies have not yet finally uncovered the secret. The salt tracer introduced into the Ponor Cave on the northern slope was detected qualitatively and quantitatively at four pseudo-springs.
While the Pegnitz River needs about 15 minutes above ground to flow around the Wasserberg, it took about 180 minutes

Translated by Google •

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Elevation 450 m

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Location: Pegnitz, Landkreis Bayreuth, Franconian Switzerland, Upper Franconia, Bavaria, Germany

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