Poland was one of the main theatres of WW2 in Europe. There are many memorials, museums and places saved from that time. In Boleslawiec we have 2 Soviet Military Cemeteries, remains of branches of a concentration camp, the Great Escape POW's Camp Museum (seen the movie with Steve McQueen?) and Gross Rosen concentration camp are within an hour drive. Auschwitz is doable in 1 day. Warsaw Uprising Museum (one of the best places I have ever been! Very interactive!) can be combined with other sights of the capital of Poland... Also you will find out that the end of WW2 was not the real end for the Poles... Communism was a next chapter of it... You will be surprised by some real life stories I know from my ancestors...
PM me with inquiries (via the contact form on the website, more4u.jarek@gmail.com or Whatsapp tel. +48502677310 )!