Head on up to the 56th floor to get the best view of Paris! The observation area up top is amazing, and you can get a near-panoramic view of all of the City. This is a great first stop to orient yourself with the enormous, amazing city. This was recommended by a top guidebook, and I highly concur. There is a short film that plays in the small theater, but the view is what Montparnasse tower is all about!