Auschwitz / Birkenau Consentration camps, Poland

From Vienna we drove the whole day to get to Oswiecum, Poland. We spent 3 days going through all the sites. This was really a eye opener, seeing how people had to suffer.
http://en.wikipedia.org/wiki/Auschwitz_concentration_camp

The famous Auschwitz 1 entrance. It says Labour/work makes free. The received their freedom through dead, they worked till they died

The Auschwitz 2 / Birkenau entrance. At this camp all the extermination took place.

The Nazi's destroyed all the gas chambers and ovens before the liberation. Here all the people had to wall into a underground room and undress for their showers

The actual gas chambers where upto 1500 people got gas at a time