Paris

Must visit:
- the Eiffel tower and Trocadero which is one of the best view of the eiffel tower ( just in front )
- Sacré coeur and Place du Tertre ( in Montmartre ) The movie " Amelie" takes place there .....
- Notre Dame de Paris, L'île saint Louis, and the river " La seine " You will got a beautiful view of Notre dame if you take the fly boat.
- The museum Le Louvre . it will take you at least ONE day
- Les champs Elysées by night and l'arc de triomphe
- Les jardins des tuileries or tuileries gardens
- Le quartier latin ( small and cute streets which is full of international restaurants... yum... )
- if you like museums you should go to "Orsay " and " Beaubourg "
- Le marais ( very old area of Paris where artists and gay people live )
- Paris Disneyland
I went last May 2010, it was not as fantastic as I thought. If you've been to US Disneyland, i think it is better over there. Some of the rides were under maintenance, nothing much.. it's really for kids..

References:
http://www.pbase.com/beatchick/best_of_paris
http://parisbytrain.com/
http://parisbytrain.com/files/2008/05/rer.pdf
http://paris.conciergerie.com/paris_budget.php
http://us.franceguide.com/info-and-publications/home.html?NodeID=607
http://www.ratp.info/touristes/index.php?langue=en&rub=reperer&cat=itineraires