The 58-story skyscraper known as Tour Montparnasse is widely considered to be the ugliest building in Paris. When it was completed in 1973, public outcry led to the prohibition of any new buildings of more than seven stories in the city center. The one thing the tower has going for it, though, is a rooftop deck with possibly the best views in all of Paris, including a unique view of the city's much more famous and beloved tower. My first-ever trip to the top of Tour Montparnasse came on an ideal day, as the morning light brilliantly caught the Tour Eiffel in all its splendor.