<p>They should be sure and book accommodations in advance, as that is a busy time in Europe.</p>
<p>They might want to research Poland – Auschwitz as one place to visit.</p>
<p>Dachau is near Munich. If they would prefer to visit Berlin, Sachsenhausen is a concentration camp site nearby.</p>
<p>Is money a concern? Northern Europe (ie, the Scandinavian countries) is very expensive.</p>