Places of interest:

Moulin Rouge:.. as long as the price is right.

http://www.moulinrouge.fr/

Catacombs of Paris.

http://www.viator.com/tours/Paris/Skip-the-Line-Catacombs-of-Paris-Small-Group-Walking-Tour/d479-3731CATACOMBS?pref=02&aid=g4529

The Louvre museum: hoping to find a woolly mamouth

http://www.louvre.fr/llv/commun/home.jsp?bmLocale=en