As the Montparnasse building is close to the hotel I stayed in, it only takes about 10 minutes to walk, making it the first attraction after arriving in France. The observation deck of the Montparnasse Building is really great, overlooking the entire Paris, with a panoramic view of the world-famous attractions such as the Eiffel Tower, the Invalides, Notre Dame, the Arc de Triomphe and so on. .