<p>I’ve been to Dachau. For me, it was a transformative experience. I haven’t been to Berlin, Sachsenhausen or Auschwitz, but Munich and Dachau are definitely worth the visit IMHO. </p>
<p>If she thinks a guide might be useful in either of those places, look up Sandemans New Berlin Tours and New Munich Tours. They have Dachau and Sachsenhausen tours in addition to the free (tips only) city tours. I did the Munich city tour and definitely recommend it.</p>