When you're not into WWII...
Get lost in the old walled city and explore the cobbled streets.
St Mary's Basilica in Rynek Glowny (the old town square). More Rynek Glowny. Wawel Castle. Wawel Royal Cathedral of St Stanislaus BM and St Wenceslaus M (phew!).
Wawel Castle. Carvings by miners in the Wieliczka Salt Mines. The mines contain a full-size chapel, where everything's carved from salt. If you do just one thing relating to WWII, visit the Historical Museum of the City of Krakow, which includes the old Schindler Factory.
Updated 15 April 2016