Hôtel de Sully

Established in 1926, it was meant to show appreciation for Muslim help in fighting the Germans. The café serves excellent mint tea and North African food.

One of the most eye-popping sights of Paris, the catacombs represent a network of labyrinthine tunnels, first excavated in the Roman period, that now house the remains of over 6 million burials removed here from the various overcrowded cemeteries and charnel houses all over Paris in the late 18th and early 19th centuries. Well worth a visit: the atmosphere is suitably morbid and gloomy (without being too scary), the dark tunnels containing neatly stacked piles of skulls and long bones. There is a limit to the number of visitors allowed within the Catacombs at one time (200 persons). So, if you arrive just after opening, you must wait until someone exits, approximately 45–60 minutes, before anyone is admitted. Steep stairwell on the exit of the catacombs. Can be challenging for the elderly or the unfit. Tickets can be purchased online at a small premium (€29, includes audioguide), allows you pick a date&time and to skip the long line

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).

Castel Béranger is an apartment building that was the first entirely art nouveau building in Paris, insulted at the time as "Castel Derangé". Its richly decorated facade won a city competition in 1898. It contains 36 apartments, all of which are still privately owned and not open to the public.

The Pasteur Museum is housed in the apartment where the great scientist spent the last 7 years of his life. Hardly touched since that time, the museum is full of personal memorabilia and scientific instruments. Pasteur is buried on the grounds in a flamboyant mosaic-decorated mausoleum. The museum was closed to individual visitors for security reasons after the 13th November 2015 Paris terrorist attacks.

Built adjoining the now-lost royal palace of the Tuileries, these gardens lying immediately west of the Louvre offer a central open space for Parisians and visitors with semi-formal gardens (an outdoor gallery for modern sculpture), various cafés, ice cream and crépe stalls, and a summer fun fair. The gardens are frequently home to a giant Ferris wheel and enclose the Musée de la Orangerie and the Jeu de Paume.

One of the last remnants of medieval Paris outside of the 4th, this tower was once part of a castle called l'hôtel de Bourgogne.

Paris's international exhibition centre (the 4th largest in Europe) has millions of visitors annually.

The burial place of existentialist philosopher Jean-Paul Sartre, feminist Simone de Beauvoir (both of whom lived nearby); musician Serge Gainsbourg; artist Man Ray; the poets Charles Baudelaire, Guy de Maupassant, Charles Sainte-Beuve, and Marguerite Duras; the founders of the Theatre of the Absurd Samuel Becket and Eugene Ionesco; the sculptors Constantin Brancusi and Ossip Zadkine; the composers Camille de Saint-Saens and César Franck; the actors Maria Montez and Jean Seberg; the French officer Alfred Dreyfus; the founder of the Larousse encyclopedia, Pierre Larousse; the industrialist André Citroen, and many others.

Once the dye works for royalty, it is now a museum.

St. Geneviève was responsible for saving Paris from the Huns in 451 and her shrine in the church has been a popular place of pilgrimage ever since. The church as it stands dates from between 1492 and 1626 and is a mix of Gothic and Renaissance architectural styles. A unique feature is the Renaissance rood screen, the sole survivor in the city.

Many feel that this, Paris' town hall, is one of the loveliest buildings in the city. You might not get that from the front view, but try watching the light change on its roofs and towers during sunset from one of the cafés on the Ile de St. Louis, the Lutece for instance. Alternatively, go to the top floor of the Bazar de l'Hôtel de Ville (BHV) department store opposite, on rue de Rivoli and walk up a flight of stairs to the roof terrace (terrasse), from which there is a dramatic view of both the roof of the Hôtel de Ville and the immediate surroundings and river. The present Hôtel de Ville replaced the 16th century original which was burned down during the Commune in 1871. A pastiche of its predecessor, but on a far larger scale, it was designed by the architects Ballu and Deperthes, chosen after a competition, and was mostly completed by 1882. The building is lavishly, and some would say heavy-handedly, decorated both inside and out, and finished in an arrestingly white stone, similar to that used for the even more eye-catching Sacre-Coeur basilica. The statue on the garden wall on the south side is of Etienne Marcel, the most famous holder of the post of "prevôt des marchands" (provost of merchants) which pre-dated the office of mayor. Marcel came to a sticky end, lynched in 1358 by an angry mob after trying to assert the city's powers a little too energetically. The Hôtel de Ville was for many years the private fiefdom of Jacques Chirac, France's president before Sarkozy, and was the site of a scandal centring on both illegal jobs given to Chirac's party members and an immense entertainment budget. General de Gaulle greeted the crowds from a front window in 1944 when Paris was liberated from the Germans and Robespierre was shot in the jaw and arrested in the original building in 1794. Admirers of Hôtel de Ville's architecture will want to know that Ballu also built the Church of La Trinité in the 9th arrondissement and the belfry of the town hall of the 1st arrondissement, opposite the Louvre's east façade. Ballu also restored the Tour St Jacques (see below), which was uncovered after restoration work lasting over a decade.

Most of the works by Picasso and others which were in the master's possession at the time of his death are now on display here.

20th- and 21st-century art in a building designed by Frank Gehry

Contained within two historic houses (hotels), the museum explores the history of Paris through objects in over 140 separate rooms.

It was conceived by Louis XV as a grand neo-classical church honouring St. Geneviève, the patron saint of Paris. After the Revolution, the building was converted into a mausoleum for the great philosophers, military, artists, scientists, and heroes of the French Republic. Occupants of the crypt include Voltaire, Rousseau, Victor Hugo, Zola, the Curies, and Alexandre Dumas (reinterred here in 2002). The view from the dome (206 steps) is marvellous. Check tour departure times at the information desk. A fascinating reconstruction of Foucault's pendulum also hangs within the Panthéon.

The massive parish church of the Les Halles area is a notable example of late Gothic interspersed with Renaissance details (including the entire front façade), as it was only completed in the 17th century. Its unique form results from a combination of relatively short length and impressive height of over 30 metres inside. The latter allows room not only for an array of stained glass windows and paintings, but also France's largest church organ of 8,000 pipes. The sculpture Écoute, depicting an oversized human head, was placed in front of the church's southern facade and has become a favourite photo spot.

Suspended above the train tracks this garden is surprisingly calm and chilled-out.

The building has a freely accessible rooftop which allows for a beautiful bird's-eye view of the northern half of Paris.