Berlin Auschwitz Bahn. The greek island of salonnika, from rotterdam, berlin, paris, prague, from budapest and brussells and bucarest…. The first deportation train departed from platform 17 on october 18, 1941.
Flixbus also offers a bus route to krakow, which you could consider. Holocaust deportation exhibit denied access to berlin central. From berlin to oswiecim (polish name for auschwitz).