The American soldiers came to where the camps were at and was helping the Jews and the old concentration camps are now being used as a museum to all for remembrance of the Holocaust
Auschwitz-Birkenau (the Auschwitz group of camps).
Poland
no.
Death Camps: Hitler created the camps so he could quietly and efficiently kill the Jewish population. Concentration Camps: Used as a sort of prison by the Nazis for the duration of the war. They imprisoned people who committed "crimes" against the Nazi regime.
Death camps were the Nazi's way to eliminate those who did not fit their mold. In all, there were seven death camps located in Europe.
The Schutzstaffel (SS).
The Nazi death camps was put into use after the occupation of Poland in 1939. After the Nazis had Jews, poles and other groups of people who were procecuted by the Nazis. Nazis wanted to kill all the Jews and any Non-Aryan Germans, so they decided to establish bunch of Death camps and Extermination camps.
The concentration camps wass ran by the Leader of the SS Heinrich Himmler
All over germany
the last gassing was in December 1944.
http://en.wikipedia.org/wiki/Nazi_extermination_camp
Your question should really be stated in the past tense, since the Nazi death camps were closed in 1945. In those camps, people were imprisoned, abused, starved, and killed.