You can combine your city trip to Krakow with an impressive tour to Auschwitz Birkenau, the largest concentration and extermination camp during World War II. In about 6-7 hours you will visit the Main Camp (Auschwitz) including the permanent exhibition and original buildings such as the barracks and gas chambers. The most important original objects at Birkenau will also be visited. After the tour you will be brought back to your pick-up point in Krakow.
