The Tour Maine-Montparnasse (also known as Tour Montparnasse, or Montparnasse Tower) was the tallest skyscraper in France until 2011 - it’s 689 ft (210 m) tall! It’s home to an observation deck on the 56th floor and a rooftop terrace on the 59th floor, which offer the best views of the Eiffel Tower, plus a cafe, and it even has a champagne bar in summer. Enjoy skipping the line to the elevators when you book a ticket in advance.