During the Second World War, the five shelters in the Renggpass were part of the fortifications in the Reduit against the Third Reich. At this point there are two caves …
The Mondmilchloch (Mondmilk Hole) is a karst cave in the Pilatus Massif (Emmental Alps) in Switzerland. It is the type locality of the so-called Mondmilch (moon milk).