The 7th Arrondissement, of course, has the amazing Eiffel Tower. But there is other stuff to do in the 7th as well.
One of the most beautiful sites is Les Invalides. It contains museums and monuments relating to the military history of France and, most significantly, is the burial site of Napoleon Bonaparte. Across the way is the École Militaire, which is a military school at which Napoleon studied.
Moreover, there is the Saxe Breteuil Market in the 7th. It has fresh fruit and veggies, meats and seafood, as well as clothes and miscellaneous kitchen supplies.
Don’t forget to check out my recommendations for the other arrondissements in Paris here.