"THE SINGING FOREST"
Here is a 1958 TIME Magazine article.
Gerhard Martin Sommer, the man in the wheelchair, had indeed been at Buchenwald—but not as a prisoner. As the master of the punishment cellblock between 1938 and 1943, Sommer was the broad-shouldered bullyboy who, in the words of West German Prosecutor Helmut Paulik, perpetrated "probably the most hideous group of sadistic atrocities unearthed since the war."
Of course, the 'singing forest' (gesang wald) is something anyone will remember from Paragraph 175...not beech forest, which is what the name means.