If you want to go to Poland you can visit the town of Crackow.
Near this beatifull town you can visit a very intersting salt mine :
http://academic.emporia.edu/aberjame...14/wielicz.htm
If you want to go to Paris, even if I live here, I can not say you what to visit. A lot a thing is worth seeing.
You can plan some feet trip around the monuments in the town or visit the museums (Le Louvre is the biguest one).
Another thing is the Chateau de Versailles, very near Paris by public transport.
If you want more info, you can pm me or respond here.
Ph