The Arc de Triomphe, a 19th century monument, is another vantage point for taking in views of Paris — especially of the Champs-Elysées and the Place de l'Etoile. I (or my camera, actually) had a good view of the arch from the top of the Tour Montparnasse.
The distance from the Tour Montparnasse to the Arc de Triomphe is about 5 kilometers — that's 3 miles. In the photo below, you can see the crowd up on the observation deck of the arch, at a height of 50 meters (165 ft.), compared to 210 meters (699 ft.) for the Tour Montparnasse.
A few years ago, CHM and I made the trip from his apartment over to the Arc de Triomphe, to take some photos. You can see some of them in blog posts of mine from 8 years ago, here and here. Below are a couple of examples.