Walking around Auschwitz I and Auschwitz-Birkenau, it's hard to fathom that such atrocities took place there less than 70 years ago. Operating between 1940 and 1945, they were the biggest of the concentration camps set up by the Nazis during WWII. Today you can walk through the barracks they used to sleep in along with the gas chambers. For tour info visit www.hostelworld.com/tours.
