Birkenau
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 II (also known as Birkenau) was on the main site, about 1.5 miles from Auschwitz I. Please see the related question.
Parts of Auschwitz I and II have been turned into a museum.
It was at Auschwitz, about four miles from Auschwitz II.
According to a book about the numbers of people died at Auschwitz, atleast 4.25 Million people died in Auschwitz II (Birkenau).
Auschwitz was around during World War II.
Auschwitz II, Buna (=Auschwitz III), Gleiwitz, Buchenwald. He only passed briefly through Auschwitz II and Gleiwitz.
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.
Birkenau .
About 17,000 at Auschwitz I, II and III combined.
It was the expansion camp (Birkenau) and it was the deathcamp.