Himmler, Heß and Wolff - Visit to Dachau May 1936
Of note is the detail of the signpost - look closely and one can see the wording Konzentrationslager (concentration camp) but also the finely detailed sculpture work depicting several prisoners being herded by camp staff - there also appears to be a guard dog visible to the right hand side of the structure as shown.
I took this image from an information point at the Topographie des Terrors (Topography of Terror) exhibition located at Prinz-Albrecht-Straße (today, Niederkirchnerstraße) and Wilhelmstraße in Berlin last year. See links below for more details:
Topology of Terror - The Historical Site
Carl