One of the classic sights in Paris is of course Notre Dame. Most tourists take their photos and selfies from the front entrance, where it is more of a vertical shot, unless you stand very far back. If you take the boat ride on the Seine River, however, especially at sunset, there are many photographic opportunities from a more unique vantage point.
I write about the boat rides so much, I should work for them in marketing! It is one of my favorite Paris things to do.