The Palais Garnier is famously known as the backdrop for The Phantom of the Opera, and its grandeur is evident both inside and out. Visitors are often struck by the lavish details, from gilded decorations to sweeping staircases.
Since the Opera Bastille opened in the 12th arrondissement in 1989, the Palais Garnier has shifted its focus. Today, it is primarily used for dance performances, with ballet taking center stage in this historic venue.
Source - https://en.wikipedia.org/wiki/Palais_Garnier
The sleaze of boulevard de Clichy between place Pigalle and place Blanche can provide a moment of distraction. Be warned if you are male it is better to do this in the company of a female fellow traveller, as the clubs often send the girls outside to attempt to physically drag passing men off of the street. These strip clubs are big ripoffs. They tempt you with a free drink for €10 entry; once in the girl who starts dancing orders a couple of drinks (Red Bull) and then before you realise you are presented with a bill ranging from €500-700. They have these big bouncers who threaten/manhandle you till you arrive at some settlement with them. The whole of Pigalle is a rip off, best avoided. The police know about these places but nothing is done.
The northwest corner of the Bois de Boulogne is occupied by the oldest operating amusement park in the world, the Jardin d'Acclimatation, which is mainly known for offering a wide range of amusements which are appropriate even for very small children. They have miniature roller-coasters for children as small as three years, and the usual range of pony rides etc.
Mainly used as a concert hall and venue for fashion shows today, the Cirque d'Hiver was built in 1852, as the name would suggest, as a winter venue for circuses.
The oldest planned square in Paris, and what many tourists as well as locals consider the heart of the Marais area.
20th- and 21st-century art in a building designed by Frank Gehry
Numerous artists paint portraits of tourists and also sell their paintings.
The Paris Botanical Garden, founded as the royal medicinal garden in 1626 by King Louis XIII's doctor, contains over 10,000 species. The grounds also include a small zoo known as La Ménagerie, and the Muséum National d'Histoire Naturelle, which includes the Grande Galerie de l'Evolution (where you can see thousands of naturalized animals from all over the world) and the 'Galerie de paléontologie et d'anatomie comparée' (same thing, but with skeletons).
A Gothic church tower in a square 150m to the west of the Hôtel de Ville was restored by Ballu, is all that remains of Eglise Saint-Jacques-de-la-Boucherie, which was the meeting place in Paris for pilgrims heading to Santiago de Compestela. As such it is included on the UNESCO World Heritage List as part of the Routes of Santiago de Compostela in France.
There are a number of famous occupants, but the real reason to visit this cemetery is to see the ornate tombstones, sculptures, and other sometimes macabre, sometimes touching memorials Parisians have left here for their dead.
Guimard's own home, built in 1909-12. It is less decorated than Castel Béranger, but still beautifully shaped. Privately owned and not open to the public.
Paris's international exhibition centre (the 4th largest in Europe) has millions of visitors annually.
Famous people who stayed here include Marie de Rohan, intriguer during the Fronde; Jeanne Baptiste d'Albert de Luynes, future mistress of a duke of Savoy; Marie Angélique de Fontanges, mistress of Louis XIV, died here giving birth to his child who also died. Today its main cloister (illustration) forms part of the modern Hôpital Cochin.
Housed in an amazing Art Deco building, purpose-built for the 1931 Colonial Exhibition, featuring an elaborate frieze across the front facade that depicts the achievement of French overseas territories. It houses an Aquarium and an Immigration Museum. The aquarium can be seen in about an hour and is popular with families with small children.
One of the truly great venues for the performing arts anywhere in the world, Paris' new opera house actually managed to inspire some neighborhood protest during its planning and construction. Pretty much everybody is a believer nowadays though. Check out the website for upcoming shows, it might even make sense to plan a trip to Paris around one.
This museum is in the historic Invalides complex and presents the history of the French Army. It is co-located with Napoleon Bonaparte's tomb (entry to which is included in the ticket price). Most of the exhibitions are very old fashioned, and the coverage of the First World War is surprisingly limited. A highlight is the Musée des Plans-Reliefs, which displays painstakingly accurate models of French fortresses and includes its own shop.
Contained within two historic houses (hotels), the museum explores the history of Paris through objects in over 140 separate rooms.