I just got back from an 8 day trip to Poland (Warsaw, Lublin & Krakow), Prague, Slovakia (Nickelsburg & Pressberg) and Vienna. Warsaw is a depressed and horrible city witout any culture left and was almost toally rebuilt after the war. However, there is a huge amount of Jewish history as back then it was a vibrant city and the Jewish Community was 350,000 strong. I would recommennd going to the Umschlagplatz where over a half a million Jews were put on trains to Treblinka, walking to the Ghetto Uprising memorial and then to Rappaport memorial. You also have Koshnitz (Koshnitzer Maggid), Ger (Chedushei Harim & Sfas Emes and Gerrer Beis Medresh), Vorka (Rav Yitzchok Vorka) & Kotzk (Rí Menachem Mendel of Kotzk) within driving distance if any of these places have meaning to you nd you can get a driver.