The city of lights romance and magic. Paris is a very breathtaking city and a very walkable city as well to we took the train most of the time and really enjoyed ourselves. Word of advice by a carinae of tickets rather than a single riding ticket it'll save you.
The Eiffel tower is beautiful especially during night time when they lighted up and don't let them have a Bastille day O the Eiffel tower is on Fire. But I do not agree with the tourist trap of dried in the elevator up to the top of the Eiffel tower. I do believe there are better and more pocket friendly areas that you can get beautiful areo glimpses of the city.
Whatever you do and whatever you decide take your time and joy who you're with, or enjoy making new friends but I will tell you this do not go New Year's Eve thinking that you will get a huge Bang because that is not a celebration that they are very big on. You just get a lot of drunk tourist and a lot of pick pockets and mischief, nothing to fear just your normal city precautions.
Points of interest
Take a river cruise to get a great view of much more.