Walk Paris in August when the weather is good, the days are long, and it's empty, for enhanced experience

I once had a long train 'connection' from Gare du Nord to Gare d'Austerlitz, early in the morning, which I decided to walk. Magical.

I took a photo of the Arc de Triomphe in the sunrise without any cars on the Place d'Etiole. Literally zero. I walked across to the Arc.

I have treasured photo, blown up to a poster, which hung on my wall for many years as a student.