Tours outside of the Czech Republic

Auschwitz - Oswiecim - Poland - 16 hours
A one day tour from Prague to this infamous concentration camp is possible although quite long.  If you don't have time to take more days, this is the solution.  RESERVATION IS NECESSARY.

Dresden - Germany - 10 hours - visit this jewel on the Elbe. 

Vienna day tour from Prague - 1 day
It is possible to visit Vienna from Prague in one day.  One of the jewels of EUrope.