The water of the river Bietsch is flowing through the bisse «Manera» to the fields and croplands on the slopes near Raron, St. German and Ausserberg. «Manera» derives from the name of the place St. German (St. German - German – Germanera - Manera). The «Manera» was first documented in the early 14th century, shortly after the founding of the Confederation. Therefore keep in mind that this bisse is a historic cultural monument of our ancestors.