sentences:  Also featured are the Walhalla temple near Regensburg, the Befreiungshalle at Kelheim, the tomb of Agnes Bernauer, and the castle at Sigmaringen to which Marshal Pétain fled in 1945.
  
  Notable places from Heidegger's own life which feature in the film include his birthplace in Meßkirch, his hut at Todtnauberg, and the lecture theatre at Freiburg University where he delivered his infamous "Rectoratsrede" (rectorial address).Eventually the film arrives at Donaueschingen, and at the Breg and the Brigach, the two tributaries whose confluence marks the point at which the river becomes known as the Danube.The film then travels upstream along the Breg, past Vöhrenbach and Furtwangen, in search of the "true" mountain source of the Danube.