A Extermination camp
It had 3 sections. Auschwitz-I, which served as a working camp. Auschwitz II-Birkenau, the death camp. Auschwitz-III, it was used to provide slave labor to the nearby industry.
Auschwitz I Stammlager, Auschwitz II Birkenau and Auschwitz III Monowitz
Large sections of Auschwitz I and II have been preserved as a museum. -------------- It is at the end of the railway line at Auschwitz II (Birkenau) between where Krematoria II and Krematoria III stood.
Auschwitz I is located in Poland, and was originally used as a prison for the "outcasts of life" such as people with disabilities, deformities, gypsies, homosexuals and Jews (unfortunately, of course). Auschwitz II - Birkenau was started in 1941 and was larger and more "deadly and famous" than Auschwitz I. Auschwitz II is what most people referr to when they say "Auschwitz". Auschqitz III - Monowitz was a chemical plant where most of the workers were slave labourers. It is in use as a chemicals factory. Tours for the public are held at the remains of Auschwitz I and II. http://en.wikipedia.org/wiki/Auschwitz
Auschwitz II (also known as Birkenau) was on the main site, about 1.5 miles from Auschwitz I. Please see the related question.
Birkenau
It was at Auschwitz, about four miles from Auschwitz II.
Parts of Auschwitz I and II have been turned into a museum.
According to a book about the numbers of people died at Auschwitz, atleast 4.25 Million people died in Auschwitz II (Birkenau).
Auschwitz II, Buna (=Auschwitz III), Gleiwitz, Buchenwald. He only passed briefly through Auschwitz II and Gleiwitz.
Auschwitz was around during World War II.
Birkenau .