• Eiffel tower
You can take in the great architecture of the Eiffel tower from below, for free. Perhaps get a baguette or croissant from a cafe nearby and have a cute picnic below the tower. Or, if you don't mind heights you can go up the tower itself, either to the first, second or third floor.
• Arc De Triomphe
The Arc de Triomphe is another amazing landmark in Paris, located at one end of the Champ Elysees, you can view the landmark from the end of Champ Elysee or even go under the roundabout to get even closer to the Arc de Triomphe. Once you have finished admiring its beauty you can go and do some extravagant shopping in Paris' most famous street.
Paris' most famous street for shopping
The Notre Dame is the most beautiful cathedral you'll visit. You can either admire it from the outside or even go in and light a candle.
The louvre is a fantastic museum, if you are from Europe, you can get into the museum for free if you have valid ID such as a driving license or passport.
•Palace of Versailles
This is just outside of Paris and I'd take a full day to be able to visit the palace and its gardens. If you're looking for Instagrammable spots, this is the place to go.
•Seine river boat cruise
You can find boat cruise ticket offices around the edge of the seine, this would be a great thing to do in the evening just as the Eiffel tower lights up. There are cheaper options for a public cruise or you could splash out and have a private boat on the Seine.
Another idea is to rent bikes which can be found all over Paris and cycle round the city.
•Parisian photo shoot
Airbnb has a lot of options where you can find photographers that will take professional photos of you at all the top locations in Paris.
•Take a cooking class
Learn how to bake French croissants or even macaroons.
There a lots of places where you can make your own wine and taste it after!
• Hop on hop off bus
This allows you to hop on and off as you please at all of Paris' top landmarks and is a good idea if you aren't a fan of the metro, taxis or uber.