Camille Flammarion Observatory

Draveil (French pronunciation: [dʁavɛj] ) is a commune in the Essonne department in the southern outer suburbs of Paris, France. It is located 19.1 km (11.9 mi) from the centre of Paris at Notre-Dame. In 2021, it had a population of 29,173. It was formally twinned with Hove, East Sussex in the United Kingdom.With a score of 7.16/10, Draveil ranks 49th among the 100 best French towns with a population of over 20,000 inhabitants. This result is a survey conducted permanently among the French population and takes into account the following factors : environment, security, medical facilities, cultural events, sports, shops and transport.

The canton of Draveil is an administrative division of the Essonne department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Draveil.It consists of the following communes: Draveil Étiolles Montgeron (partly) Saint-Germain-lès-Corbeil Soisy-sur-Seine

Juvisy is a railway station in Juvisy-sur-Orge, Essonne, Île-de-France, France. The station was opened in 1840 and is on the Paris–Bordeaux railway, Villeneuve-Saint-Georges-Montargis railway and Grande Ceinture line, a freight railway around Paris. The station is served by Paris' express suburban rail system, the RER Line C and RER Line D. The train services are operated by SNCF. A TGV high-speed service also serves the station. During a survey in 2015, the station served 33,426,629 passengers in that year.From 2014 to 2019, the station received 97 million euros for restructuring works and to create an intermodal hub to facilitate transport changes in the station between the train lines and the 28 bus lines for their 70,000 travelers every day.In 2018, according to SNCF estimates, the station's annual attendance was 41,423,348, placing it as the seventh station in France in terms of number of passengers, and the number one station in France outside of intramural Paris; it is notably ahead of the Paris-Est and Lyon-Part-Dieu stations.

Athis-Mons (French: [atisˈmɔ̃s] ) is a commune in the southern suburbs of Paris, France. It is located 16.5 km (10.3 mi) from the center of Paris. Inhabitants are called Athégiens. A small part of Orly International Airport lies on the territory of the commune of Athis-Mons.

Juvisy-sur-Orge (French pronunciation: [ʒyvizi syʁ ɔʁʒ] , literally Juvisy on Orge) is a commune in the Essonne department in Île-de-France in northern France. It is located 18 km south-east of Paris, a few kilometres south of Orly Airport. The site of the town has been occupied from ancient times; it is noted in Julius Caesar's book about the Gallic Wars. Centuries later, it became an important place under the French monarchy, as a royal hotel. It would also be used as a post relay, the first one on the road to Fontainebleau. It became a major road and railway junction in the 1840s after its railway station was built in 1840, and after 1893 was the first city surrounding Paris with a bridge crossing the river Seine. Most of the city was destroyed in April 1944 by an Allied bombing as the city was the only one surrounding Paris that had such a big railway station and had railway lines going to most of France's major cities. It was then rebuilt between 1945 and the 1970s. The city is today known for Gare de Juvisy, the fourth largest and most-frequented railway station in the Grand Paris.

Vigneux-sur-Seine (French pronunciation: [viɲø syʁ sɛn] , literally Vigneux on Seine) is a commune in the southern suburbs of Paris, France. It is located 17.6 km (10.9 mi) from the centre of Paris. Inhabitants of Vigneux-sur-Seine are known as Vigneusiens.

The Orge (French pronunciation: [ɔʁʒ] (listen)) is a 54.1-kilometre (33.6 mi) long river in France, left tributary of the Seine. Its source is in the village Saint-Martin-de-Bréthencourt. Its course crosses the départements of Yvelines and Essonne. It flows northwest through the towns of Dourdan, Saint-Chéron, Breuillet, Arpajon, and Savigny-sur-Orge, finally flowing into the Seine in Athis-Mons, south of Paris. The towns located on the banks of the river usually have s/ Orge added to their name (i.e. Épinay-sur-Orge, Longpont-sur-Orge, Villiers-sur-Orge). The Yvette is a tributary of the Orge.

The canton of Athis-Mons is an administrative division of the Essonne department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Athis-Mons.It consists of the following communes: Athis-Mons Juvisy-sur-Orge Paray-Vieille-Poste

The canton of Vigneux-sur-Seine is an administrative division of the Essonne department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Vigneux-sur-Seine.It consists of the following communes: Crosne Montgeron (partly) Vigneux-sur-Seine

Lac de Viry-Châtillon is a lake located in the municipalities of Viry-Châtillon and Grigny in the Essonne department, France. The lake consists of five basins: étang des Nouées de Seine, étang de la Justice, étang de la Place Verte, étang de la Plaine Basse and étang de l'Arbalète.

Viry-Châtillon (French pronunciation: [viʁi ʃatijɔ̃] ) is a commune in the southern suburbs of Paris, France. It is located 20.9 km (13.0 mi) from the center of Paris.

The canton of Viry-Châtillon is an administrative division of the Essonne department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Viry-Châtillon.It consists of the following communes: Grigny Viry-Châtillon