how do the prisoners get from Birkenau to Auschwitz and what are their first impressions of this new camp?

They arrive in cattle wagons. As the train pulls into the camp, everyone suddenly sees the flames and chimney that Madame Schaechter had prophesied. When her vision finally materializes, Madame Schaechter becomes silent. Everyone is forced to get out of the train, amidst the smell of burning flesh. They are at Birkenau, the reception center for Auschwitz.