Everyone knows about the view from the Tour Eiffel, Arc de Triomphe, Galeries Lafayette roof, Tour Montparnasse, Notre Dame, Sacre Coeur, but not many tourists realize one of the best, especially on a clear day, is from the top tier of the Pantheon. Tours leave from the ground floor at appointed hours from April to October. Small admission charge. For details, see page 42 of your No Worries Paris guidebook.