Montparnasse Tower 56th Floor Observation Deck. Take in panoramic Paris views from the 56th floor observation deck of the Montparnasse Tower. Europe’s fastest elevator will whisk you up to the open-air rooftop of this modern skyscraper for unparalleled views of the Eiffel Tower, Champs- Élysées and other famous landmarks. Visit during twilight for an aerial perspective of the glittering City of Lights, and upgrade to sip a glass of Champagne at the rooftop bar. Book with us Save 10%! Montparnasse Tower 56th Floor Observation Deck