Centre national de formation des Scouts et Guides de France

Château de Jambville is a French castle located in the town of Jambville in the Yvelines department, 50 km northwest of Paris. The castle was built between the 15th century and the 18th century on the foundations of a medieval castle. The lordship was granted to the steward Antoine Le Camus de Jambville in 1650. It passed in 1769 to the Marquis Charles-Claude-François du Tillet, colonel in the Royal Regiment, and to the stewardship of Étienne Thomas de Maussion in 1775. It was sold as national property in 1793. Baron Antoine Adolphe Thomas Maussion became the owner in 1816. in 1904, it was acquired by Paul Fould (1837-1917), master of requests to the Council of State. It has hosted the National Scout Training Centre of the Scouts et Guides de France since 1952.

Jambville (French pronunciation: [ʒɑ̃bvil]) is a commune in the Yvelines department in the Île-de-France region in north-central France. It is 50 kilometres to the north west of Paris in the heart of the Vexin national park. Château de Jambville is the Centre national de formation des Scouts et Guides de France (National Training Centre for Scouts and Guides of France). The chateau dates from the 16th to the 19th Century.

Oinville-sur-Montcient (French pronunciation: [wɛ̃vil syʁ mɔ̃sjɑ̃]) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Seraincourt (French pronunciation: [səʁɛ̃kuʁ] ) is a commune in the Val-d'Oise department in Île-de-France in northern France.

Frémainville (French pronunciation: [fʁemɛ̃vil] ) is a commune in the Val-d'Oise department in Île-de-France in northern France.

Montalet-le-Bois (French pronunciation: [mɔ̃talɛ lə bwa]) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Brueil-en-Vexin (French pronunciation: [bʁyɛj ɑ̃ vɛksɛ̃], literally Brueil in Vexin) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Lainville-en-Vexin (French pronunciation: [lɛ̃vil ɑ̃ vɛksɛ̃], literally Lainville in Vexin) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Gaillon-sur-Montcient (French pronunciation: [ɡajɔ̃ syʁ mɔ̃sjɑ̃]) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Avernes (French pronunciation: [avɛʁn] ) is a commune in the Val-d'Oise department in Île-de-France in northern France. On 1 January 2018, the former commune of Gadancourt was merged into Avernes.

Villa Paul Poiret in Mézy-sur-Seine, Yvelines, France, is an early 1920s Cubism-inspired Art Deco private house originally designed by architect Robert Mallet-Stevens. The house stands in 48,500 square metres (12.0 acres) of parkland in Mézy-sur-Seine, to the west of Paris, overlooking the Seine Valley. It is constructed in reinforced concrete in a geometric style, has 25 rooms on three levels, 800 square metres (8,600 sq ft) of internal space, an upper terrace with panoramic views, and a 7-metre-tall (23 ft) corner salon with floor-to-ceiling windows.Villa Paul Poiret was commissioned by fashion designer Paul Poiret in 1921; its building completed in 1925. The house fell into disrepair, and was sold by Poiret in 1930 to actress Elvira Popescu, who lived there from 1938 to 1985. Popescu hired the architect Paul Boyer in 1932 to alter the original design to the contemporary Art Deco Paquebot (steamship) style, converting windows to portholes, and rounding-off terrace corners. The house was listed as an historic landmark in 1984.In 1999 the house, which had once more become dilapidated, was bought by Laurent Brun. Under the auspices of the French National Historic Landmark Commission and the Bâtiments de France, (the two bodies responsible for listed buildings), the Mallet-Stevens exterior and the Popescu/Boyer interior have been restored.Villa Paul Poiret is part of the Journées de Patrimoine, (Heritage Days), scheme in which public and private buildings of historic importance are open to the public on the third weekend in September.

Mézy-sur-Seine (French pronunciation: [mezi syʁ sɛn], literally Mézy on Seine) is a commune in the Yvelines department in the Île-de-France region in north-central France.