Publicación en Leuven

Hi everyone. I will land to Cologne on the 1st of July (until 4th of August) and I am going to explore Germany and neighbor countries like Belgium as much as I can. I will pass though this beautiful country and I want to explore it more with some local people. I will be very grateful if someone advise me the places where to go (must see). Thanks a lot beforehand. Regards Sadig