Newly re-opened Louxor cinema:

In the 10th arrondissement right opposite Barbes-Rochechouart metro stop. The official site is http://www.cinemalouxor.fr/ and there's a history of it and this is the story of the refurbishment 

The Montmartre vineyards
Not always mentioned in guides, the Montmartre vineyards give a country-like look to one side of the hill, which is quite surprising: http://www.phan-ngoc.com/fred/paris/h.... The area was planted with vines in 1932 and spreads on 1556 square meters. The Clos Montmartre wine production is 1000 bottles. This site is not open to the public and is gated off. You can only see the vineyard from the sidewalk. La Commanderie du Clos Montmartre
9 bis, rue Norvins 75018 Paris
Tel: + 33 (0) 1 44 92 35 34 - Fax: + 33 (0) 1 42 62 96 88

 Because some people often think that Montmartre is only the Sacré Coeur and La place du Tertre : but it's really not representative of Montmartre ! You should get lost in the little romantic streets where there are almost no tourists, see the vineyards, artists studios, lovelly alleys and parks  

Go to the movies! 
May sound simple but Paris is a - movie capital of the world.  It is said that there are more than 500 different movies playing in Paris and almost half are in English (with french subtitles). Many of them are classics - Hitchcock, Woody Allen etc. Pick up a copy of Pariscope or Officiel des Spectacles for 40 cents at any newsstand (weekly, comes out on Wednesday) and you can find movies by title, genre, location etc, or you can use a french website dedicated to movie programmation which is call "Allociné" .  An English language movie playing in English with French subtitles (not dubbed) will be marked VO or VOST.  There are also an enormous number of films dubbed in Spanish and other languages.

Musee Grevin 

Paris' answer to Madame Tussaud's. It's set in a beautiful old building and it is quite entertaining, though expensive (22euros). Here's a review of it and this is the official website: http://www.grevin.com

 Canal Saint Martin

 A lovely canal near to Gare du Nord : there are plenty of little cafés and shops all along the way, and you can do as Parisian do during summer: bring a bottle of wine and some cheese on the evening (after work) to enjoy the sunset  

Old books market
Not as popular as the flea markets of Paris, this market is fully dedicated to ancient books and aimed to bibliophiles. If you are a collector or just a book lover, you will find gems here. Square Georges Brassens
104, rue Brancion – 75015 Paris.
Saturday & Sunday from 9.30 am to 6.00 pm.
Metro: Convention or Porte de Vanves

Flea Markets
Of course on week-ends Paris turns into like a world capital for flea markets. There’s the Vanves market in the south of Paris , the Montreuil to the East and, most important, the Clignancourt to the North – the largest flea market in the world, and an amazing collection of odds and ends ranging from vintage clothing to inlaid furniture from the Sun King. 
English-language  Paris Flea market insider’s tour

Cour Saint-Emilion (Bercy Village)
A little bit away from the center of Paris, between Bercy and the Bibliothèque Nationale de France, the Cour Saint-Emilion is a village of spacious boutiques and restaurants recently built in old Bercy storehouses. This commercial area retains a nice genuine atmosphere and is not the most crowded in Paris.
Metro: Cours Saint Emilion

Square "Marché Sainte Catherine": in the heart of the lively Marais neighborhood you will find this little lovely square which is really peacefull and full of small and delicious restaurants and brasseries. It is the perfect place to have dinner or just a drink after a nice walk in the area !  

The Viaduc des Arts and its Promenade Plantée
Traditional craftsmen have opened their trendy boutiques under the arcades of a former viaduct going from the Place de la Bastille to Gare de Lyon and well beyond, on the Avenue Daumesnil. Find the stairways that go up on the viaduct every 100-150 meters and you will discover a long and thrilling pedestrian promenade called “ Promenade Plantée” or “Coulée verte”.
Metro: Daumesnil, Bastille or Gare de Lyon.

The Arsenal Marina
At the intersection of the Canal Saint Martin and the Seine, the Arsenal marina is a cute hidden spot to wander around and admire the nice boats.
Metro: Bastille

The Rue Cler
Located in the 7th Arrondissment and a short walk from the Eiffel Tower, the Rue Cler is a popular market street that will give visitors a taste of everything typically Parisian in just a short walk. This lively cobblestone street effectively preserves the ambience of Paris of old and is home to countless small shops. Many Americans like this area to dine and relax in. Market is there on Sundays. Within a 2 block span, you will find a cafe, a supermarket, an outdoor fruit and vegetable market, a floral shop, 2 hotels, a post office, a pastry shop, and a butcher shop. A true hidden gem! Closest metro is Ecole Militaire. 1 hour.
Attraction type: Street; Flea/street market

Musee Carnavalet
This museum documents the history of Paris from its beginnings through modern times and includes impressive exhibits on Voltaire and Rousseau.  Located in the Marais, it is an interesting exhibit.  Admission is free.
Attraction type: History museum; Architectural building; Historic home

Sewers of Paris (Les Egouts de Paris)
For an alternative view of Paris, take the hour-long tour that is offered of the 1,300 miles that make up the Parisian sewer system.  Fascinating.  Near Eiffel Tower , at the Pont de Alma.  If you are in Paris in the hot weather, go here to cool off. They also have a humorous video presentation a la “Cops”.  Not for everybody.   1 hour.
Attraction type: Historic site; Landmark/point of interest; History museum

Pere-Lachaise Cemetery (Cimetiere du Pere-Lachaise)
This famous cemetery is the burial site of numerous French luminaries - authors, writers, paintors, scientists, musicians, politicians and more.  Jim Morrison, Maria Callas, Sarah Bernhardt, Oscar Wilde, Edith Piaf, Cuvier, Arago, Champollion, Rossini, Bellini, Cherubini, Chopin, Bizet, Poulenc, J. L. David, Ingres, Gericault, Delacroix, Daumier, Corot, Pissarro, Caillebotte, Seurat, Marie Laurencin, Modigliani, Max Ernst, Molière, La Fontaine, Saint-Simon, Beaumarchais, Balzac, Musset, G. de Nerval, Courteline, Proust, Apollinaire, Eluard, Colette, Méliès, Haussmann, Héloise & Abélard, Allan Kardec and many other famous names are buried here.  Don’t miss the Holocaust and Mur des Fédérés monuments.  Buy the map at the entrance.  You need to consider that the the cemetery is large, has cobblestone walkways which some may find difficult to walk on,  and may take some time to cover.  Web site: http://www.pere-lachaise.com/perelach...
Attraction type: Cemetery; Landmark/point of interest

The Catacombs (Les Catacombs)
Underground stone quarries that hold since 1786 the skeletons of six million parisians removed from the suppressed cemeteries.  This place is a lot of fun, but you might find it to be gruesome.  Bring a flashlight.  Lots of steps.  90 minutes.
Attraction type: Cemetery; Historic site; Cavern/cave

Musee Marmottan-Monet
Located in a 19th-century mansion, this museum's fabulous collection of Impressionist paintings ranks second only behind the Musée d'Orsay.  The best kept secret in Paris .  An absolutely fantastic collection of Monet’s paintings are displayed here in a relaxing atmosphere, quite different from what you will find at the Orsay.  Don’t miss it.  A little bit out of the way.  No photos.  Museum pass not accepted.
Attraction type: Art museum

Opera Garnier
This performance hall hosts  ballet and chamber music performances.  On Thursday afternoons, they have the tour in English.  A gorgeous, romantic building.  Home of the “Phantom of the Opera”.  The Roissybus from CDG drops you here.  Note:  The second Paris Opera House is at the Place de la Bastille.  1 hour.
Attraction type: Architectural building; Opera; Theater

Basilique St-Denis
It is the burial place of nearly all of the kings and queens of France .   This is one strange place.  A long metro ride.   You will see the tombs of people you read about in your history books – Clovis , Marie Antoinette, Louis XIV.  Not for the faint hearted.  2 hours.  45 minute metro ride.
Attraction type: Religious site; Architectural building; Historic site

Musee des Arts et Metiers
Attraction type: Specialty museum; Science museum.  More than fascinating.  The first PC (so the French claim),  Foucalt’s Pendulum, Edison ’s machines, TV’s from 1931, Cray Supercomputer and more. Welcoming you at the door is a human-size replica of… the Statue of Liberty, a present from the French to the Americans.   Just a great  collection of scientific/engineering wonders.  3 hours.

Cite des Sciences et de L'lndustrie
This large interactive science museum has numerous exhibits dedicated to making science comprehensible for non-scientists.  Located at Parc de la Villette. This is another one of the best kept secrets in Paris .  Perhaps the best science museum in the world. Kids are amazed by this museum, adults are astounded.   The music museum is nearby.  You can combine your trip here with a trip down the Canal St. Martin. 
Attraction type: Science museum

With Kids

Besides the attractions listed here (Catacombs and Sewers in particular), take advantage of

- a game of boules in the park – boules are the French equivalent of bocce balls. Fun for the entire family:

- amusement park Parc Astérix, the French ‘response’ to Disney.

- jardin d’acclimatation. Situated in the beautiful  park of  bois de Boulogne , it is an amusement park esp. geared for small children, and a traditional favourite of Parisian families. No tourists there! You will feel very local. http://www.jardindacclimatation.fr/  

Army Museum (Musee de l'Armee)
Nearly every weapon and instrument of war imaginable can be found in this comprehensive collection of military equipment.  This is a do-not-miss site.   Go to the World War II exhibit and see  how De Gaulle won the war.  A very somber exhibit on the holocaust.   Fascinating.  2.5 hours.
Attraction type: Military museum

Bateaux Mouches
These boat tours down the River Seine, complete with historical commentary, depart from a location close to the Eiffel Tower, Pont de l'Alma.  A very relaxing and worthwhile tour.  You may prefer the cruise down Canal St. Martin too. 1.5 hours.  And don’t forget, the Bateaux Parisien has a nice dinner cruise. 
Attraction type: Tour; Tourist/visitor center

Canal St. Martin-Canauxrama
A lovely boat tour through the canals of Paris .   Remember the movie “Amelie”? You get a wonderful opportunity to view some pretty neighborhoods of Paris .  People watch you as you pass through the locks.  Complete with historical commentary, depart from the Parc de la Villette and end up at the Bastille.  A very relaxing and worthwhile tour.  Sit at the very front of the boat.  1.5 hours.
Attraction type: Tour; Tourist/visitor center.  Web site:  http://www.canauxrama.com/e_saint-mar...

St-Sulpice
If you read The Da Vinci Code, you have heard of this place. A glorious example of Classical architecture from the 17th century. The brass line inside is part of an astrological gnomon, a clock used to set the date of Easter installed by Louis XV in the 18th century. (Not to be confused with the Meridian of Paris, which runs behind the church and is marked outside with brass plaques! Find some of these in the Louvre courtyard.)   ½ hour.
Attraction type: Religious site

 * Everything in regular font from “ My Favorite Sites” is from www.tripadvisor.com.   Commentary has been added in italics .

Dome of Sacré Coeur Basilica
Most tourists go as high as the terraces for the Paris panorama. Many don't realize they can go higher for the price of 6 euros. Climb 300 windy narrow cement steps to the top and find one of the most spectacular 360 degree views of the city, second only to the Eiffel Tower.
Attraction type: Walking tour.  Web site:  http://noworriesparis.com/tag/sacre-c...