I usually have a couple of running routes that I stick with. This was formerly the conservancy in Middleton.
Route #1 in Paris is the Arc De Triumphe: https://maps.google.com/maps?hl=en&authuser=0 (hit My Places, the Walking Directions to Places Charles De Gaulle)
It’s a 10k; ran it with my love today. Highlights: Crossing the Seine, Le Grande Arche (La Defense), Arc De Triumph & Tour Eiffel