Kriegsverbrechergefängnis Spandau
In 1951, Serrano travelled to Europe, and in Germany visited various sites associated with the Nazi Party, including Hitler's Berlin bunker, Hitler's Berghof home, and Spandau Prison, where Rudolf Hess and other prominent Nazis were then imprisoned. During this trip he also visited Switzerland, where he met and befriended the writer Hermann Hesse and the psychoanalyst Carl Jung.