My favorite spot in Paris is the Père Lachaise cemetery in the 20th arrondissement. A bit morbid, maybe, but each one of the thousands of graves there is a unique work of art. Put them all together, and the place is absolutely breathtaking. You can also go hunting for the tombs of famous figures!
http://www.pere-lachaise.com/
In terms of a good meal, Alizée pointed me in the direction of a great little gem in her list of favorite places for Gala magazine:
http://www.gala.fr/modules/carnet/ca...b=7&star_id=27
LA CAFETIERE
21, rue Mazarine, Paris 6e
Tél. : 01 46 33 76 90
"Très original."
It's small and hard to find, but worth the search for a quality mid-priced supper. Just avoid the beef pattie - too much onion. Get the chocolate mousse for dessert, it's amazing.
Have fun in Paris!