You should be able to get a good shot of Venus d'Milo however don't expect to get a photo of the Lisa painting because its nearly constantly surrounded by tourists snapping away and the excess flash ruins most pictures.
Another good spot for taking pics is the Moulin Rouge building with its famous windmill exterior. Watch out for pickpockets in the area, as they do prey on oriental tourists.
Finally I would recommend going for a boat trip on the river Seine, Paris has some very nice bridges and they can be great foreground in pictures of the Notre dame and Eiffel tower.