When researching for my trip to Paris, I found that Parc de Belleville in the 20th arrondissement was tipped to have great views.
The Skyline of Paris with the Eiffel Tower and an amazing sunset
Montmartre is the more famous spot, but Parc de Belleville has the views without the tourists. And as this spot is more east of the city there is a better view of the Eiffel tower with the sun setting in the west. I am normally not chasing a sunset but this particular evening we had the most amazing sunset which completed this image of the Paris skyline, definitely the right place at the right time. An earlier shot in Parc de Belleville can be found here and this is a link to the Paris Gallery