Paris, is, hands-down, my favorite European city (sorry, London….). Were it not for that whole language-barrier thing, I might have tried to runaway to Paris earlier on in life and never have come back. As a tourist, there is no need to put any effort into seeing why this city is so spectacular. Its beauty (those graceful buildings! the bridges! the parks! the grands boulevards!) practically hits you over the head.
Paris is an immensely walkable city — you could take the afternoon and ramble from the Eiffel Tower to Trocadero and the Champs Elysees down the Seine to the Latin Quarter, then head over one of the many bridges to the Tuileries, stopping at a cafe for a glass of wine or a coffee when you need a rest.
While lounging on the Champs de Mars (the park next to the Eiffel Tower) we saw a couple become engaged!