Headed to Paris- last minute change. Looking for favorites

I love impromptu! It just adds to the already over-the-top excitement.
My husband and I are returning to Paris in just three days--it's our 6th or 7th trip there. We, too, are visiting no museums (except maybe Marie Curie's as we'll be in the 5th and my husband is a physicist--so. . .) Love the museums in Paris but we've seen all the major ones and many minor ones. This time, we're visiting many parks because this time of year they should have many blooms and blossoms.

We're walking the Coulee Verte to the Bois de Vincennes; visiting Jardin des Plantes, Luxembourg Gardens, Tuileries, etc. We're going to walk our usual: Notre Dame, Ile Saint-Louis (get Berthillon), along the Seine, over many bridges, maybe Pere Lachaise, off the beaten path in Montmartre.
Please let us know what you decide. Enjoy!

I think Montparnasse is overlooked except for those tracking down the Catacombs or tower. Several walking guides online.

Lindy, Marie Currie’s lab was worth the stop to me. Many visits to Paris over many years. I finally stopped in just post-Covid. Interesting and not overly time consuming.

Sacre couer, Montmartre, and the little train you take around the area. The Rodin museum, we didn’t actuallly have time to go in as we arrived an hour before closing and we spent all that time in the wonderful garden.

Parc Monceau is one of my favorites!

Wander Rue des Martyrs, a quintessential Paris street of small food purveyors and filled with locals etc. There is even a book written about it by Elaine Sciolino.

Loved the half day we spent walking through covered passageways. Passages couvertes.

Galerie Vivienne, Passage du Grand Cerf, Galerie Colbert, Passage Jouffroy and Passage des Panorama are all pretty much in a line north of the Jardin du Palais Royal.

Any interest in Art Nouveau architecture? There are some cool facades in the 7th designed by Jules Lavirotte

https://www.youtube.com/watch?v=_DnH6Q33HQ8

I've done a few DIY walks pulling information from youtube videos and websites. I did one with churches and Sainte-Genevieve(Patron Saint of Paris) and also did one of Roman sites in Paris.

Have you looked at any of the Corey Frye youtube videos? He has done some excellent walks thru the years in case he's hit a neighborhood you may be interested in.

I also did a cemetery focus on one trip going to both Pere Lachaise and Montparnasse (President Jacques Chirac died when I was in Paris in 2019 so I went to see his gravesite with all the flowers). I've got a few in mind for the next trip including the American Cemetery at Suresnes and a smaller one that is open limited hours.

The coolest thing we've ever done in Paris was visit the pet cemetery (Cimetiere des Chiens) in Asnières-sur-Seine. I could have wandered there for hours.

We just returned from Paris and really enjoyed the VR Impressionist experience at Musee d'Orsay.
Yes, it's at a museum, but quite different from a normal museum visit. It was lot of fun and realistic enough that when my granddaughter playfully walked off a balcony onto "thin air", I couldn't bring myself to follow. (I'll admit to being scared of heights.)
We had reservations, but saw people getting right in with no reservations.

Thank you all for so many great suggestions. We had 4 fabulous days in Paris- beautiful weather, sightseeing, food. We could not have had a better time. We arrived late afternoon first day and after the only rain we walked from hotel, Hotel Oberservatoire Luxembourg to Notre Dame, Ile Saint Louis to the Louvre, Jardin de Tulieres and metro back to our hotel. My partner decided that night he did want to visit the Louvre and we were able to get tickets for the following afternoon. It was busy but manageable. We got to Sacre Coeur, the last time I visited was my first visit to Paris in 1988. We got to Bois de Vincennes for a quick walk, Jardin de Luxembourg was near our hotel so we walked through several times and tried to stop at every park and green space we came across. While in the Netherlands we cancelled our Keukenhof trip so I also decided to go back to to Giverny. I've seen the gardens in late spring and early summer. We rented bikes in Vernon and biked to the house for a later afternoon entry. The gardens were not too busy but as usual there was a lineup for the house and it was crowded. Discovered many covered passageways and loved Rue des Martyrs. I've saved some of the other suggestions for our next visit. Paris was really busy. It seemed like most of the time we heard every other language except French around us. There was event seating near Place de Concorde set up and the Concorde metro station has now closed until September.. Parisians were kind and helpful and with one exception, wherever we went was spotlessly clean including the metro. Thanks again for the the great tips.