Mont Valérien From the Mont Valérien, Suresse, the French physicist Fizeau projected a lightbeam towards a mirror at Montmartre. Interposed in the path was a rapidly spinning cogweel with 720 precisely machined teeth. The beam would be exclipsed if the spin of the wheel was going faster. From this, Fiezau could calculate the speed of light as 315 400 km/sec. This was 1849! Author: <a href="https://www.routeyou.com/user/view/2482.en">Dromos</a> <a href="https://www.routeyou.com/location/view/47224882.en?toptext=576627">More information</a> Hill Château d'Agnou The Château d’Agnou is a château, or manor house, situated in a place locally known as Bout d’Agnou in Maule, France. It is classified as a French historical monument. In the 12th century, a castle called the Château Saint-Vincent was raised on the spot of the present manor. Built in the faubourg of Agnou, within the fiefdom of the Boutigny family, it stood outside the long walls that enclosed Maule. The Boutignys owned the castle from the 13th century on: first Hugues de Boutigny, Lord of Gavral, then his son Jean de Boutigny. However, it was later dismantled by order of King Louis VI. In 1357, the city was pillaged by Charles II of Navarre, who totally leveled the edifice. From then on, the barons of Maule lived in town, in houses constructed for them. This situation would change in the 16th century. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47832388.en?toptext=1285392">More information</a> Castle Villepreux Villepreux ) is a commune in the Yvelines department in the Île-de-France in north-central France located about 12 km west of Versailles, in the plaine de Versailles, almost in line with the perspective of the Grand Canal . The municipality, in low relief, is marked in the northern part of the depression of the valley ru Gally, and its tributaries, the ru de l'Oisemont and the ru de l'Arcy. The municipality is still largely rural. Urbanization is about 15% of the area, developed in the southern part, in the vicinity of Clayes-sous-Bois in the area served by railway services from Paris and Versailles. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47252100.en?toptext=1292418">More information</a> Municipality Arboretum de Grignon The Arboretum de Grignon is an arboretum located within the campus of the Institut des sciences et industries du vivant et de l'environnement on Avenue Lucien Brétignières, Thiverval-Grignon, Yvelines, Île-de-France, France. It is closed to the public but may be visited by groups. The arboretum was established in 1873 by Pierre Mouillefert, professor at Grignon, who published in 1896 a pamphlet describing the arboretum at that date; however, it was lost in 1940. The arboretum grew gradually over time, with the most recent plantings between 1976-1978. Various of the trees were labeled in 1975 by Mr. George Callen of the Arboretum de Chèvreloup, and in 1991 Mr. Augustin Scalbert created a map identifying almost all trees. At that time, the arboretum contained approximately 230 specimens . Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47835295.en?toptext=1292442">More information</a> Arboretum Chavenay Chavenay ), also known as Vallon de Chavenay, is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located close to Saint-Nom-la-Bretèche, Saint-Germain-en-Laye, and Versailles.Along with Crespières, Feucherolles and Saint-Nom-la-Bretèche Chavenay is twinned with Rösrath, Germany. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47249320.en?toptext=1292465">More information</a> Municipality Neauphle-le-Château Neauphle-le-Château ) is a commune in the Yvelines department in the Île-de-France region in north-central France.Neauphle-le-Château gained international fame in 1978 when, on October 8, Iranian Islamic leader Ayatollah Ruhollah Khomeini rented and moved into a house there following his exile by the regime of Shah Mohammad Reza Pahlavi in the midst of the Iranian Revolution, and after being deported from Iraq where he was taking refuge amongst the Shi'a community. The Ayatollah continued to reside there until the following year when he returned to Iran following the collapse of the Shah's regime and later became Iran's Supreme Leader. Due to the Ayatollah's time residing in Neauphle-le-Château, the street in Tehran on which the French Embassy in Iran is located and was previously known as Faranseh street, is now renamed after the village. The property where he lived, at the corner of the Chevreuse Road and Jardins Path has long been fenced off and locked and the former dwelling is now destroyed. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47479458.en?toptext=1292475">More information</a> Municipality Saint-Germain-de-la-Grange Saint-Germain-de-la-Grange is a commune in the Yvelines department in the Île-de-France in north-central France. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47244908.en?toptext=1292497">More information</a> Municipality Forêt de Marly The Forêt de Marly is a 2000 hectare forest estate in Yvelines, between Saint-Germain-en-Laye and Versailles about 15 km to the west of Paris. It is about 12 km long east to west, over the communes of Louveciennes, Marly-le-Roi, Saint-Nom-la-Bretèche, Feucherolles and others. Historically, it was a hunting estate of the kings of France, then of the presidents of the Republic, but is now divided along its whole length by the A13 autoroute. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47835354.en?toptext=1292569">More information</a> Forest Bazemont Bazemont is a commune in the Yvelines department in Île-de-France France. It is situated 18 km south east of the town of Mantes-la-Jolie. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47237077.en?toptext=1292846">More information</a> Municipality Le Pecq Le Pecq ) is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located in the western suburbs of Paris, 18.4 km from the center of Paris.The commune of Le Pecq is located in a loop of the Seine river, 19 km west of Paris, at the foot of the chateau of Saint-Germain-en-Laye. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47250490.en?toptext=1295175">More information</a> Municipality National Archaeological Museum The Musée d'Archéologie nationale is a major French archeology museum, covering pre-historic times to the Merovingian period. It is located in the Château de Saint-Germain-en-Laye in the département of Yvelines, about 19 kilometres west of Paris.The château had been one of the most important French royal residences in the Paris region since the 12th century. Following the move of the court to Versailles, the castle housed the court of James II of England in exile, became a cavalry school in 1809 and finally a military prison from 1836 to 1855. The château, which was in very poor condition, was classified as a monument historique on 8 April 1863. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47836271.en?toptext=1295187">More information</a> Museum Château de Saint-Germain-en-Laye The Château de Saint-Germain-en-Laye is a former royal palace in the commune of Saint-Germain-en-Laye, in the département of Yvelines, about 19 km west of Paris, France. Today, it houses the musée d'Archéologie nationale .The first castle, named the Grand Châtelet, was built on the site by Louis VI in 1124. The castle was expanded by Louis IX in the 1230s. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47836276.en?toptext=1295192">More information</a> Castle Saint-Nom-la-Bretèche–Forêt de Marly station Saint-Nom-la-Bretèche–Forêt de Marly is a railway station in the French commune of L'Étang-la-Ville in the département of Yvelines. Its name derives from Saint-Nom-la-Bretèche and the Forêt de Marly. It links to the CSO bus line 1.It is one of the termini of the Transilien Paris–Saint-Lazare, made up of one platform between two lines. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/4483267.en?toptext=1295255">More information</a> Trainstation Rocquencourt Rocquencourt ) is a former commune in the Yvelines department in the Île-de-France in north-central France. On 1 January 2019, it was merged into the new commune Le Chesnay-Rocquencourt. It is about 4 kilometres north-west of Versailles and 19 kilometres west of center Paris.The commune is mainly known as the location of a research unit of INRIA as well as a freeway exchange known as the Rocquencourt Triangle , which is often mentioned in traffic news. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47232253.en?toptext=1295292">More information</a> Municipality Gambaiseuil Gambaiseuil is a commune in the Yvelines department in the Île-de-France region in north-central France. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47246112.en?toptext=1342398">More information</a> Municipality Millemont Millemont is a commune in the Yvelines department in the Île-de-France region in north-central France. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47251628.en?toptext=1342423">More information</a> Municipality Garancières Garancières is a commune in the Yvelines department in the Île-de-France region in north-central France. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47246113.en?toptext=1342427">More information</a> Municipality Gambais Gambais ) is a commune in the Yvelines department in the Île-de-France region in north-central France. The commune is 58 km west from the center of Paris. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47246115.en?toptext=1342447">More information</a> Municipality Montfort-l'Amaury Montfort-l'Amaury is a commune in the Yvelines department in the Île-de-France region, north central France. It is located 20 km north of Rambouillet. The name comes from Amaury I de Montfort, the first seigneur of Montfort.Montfort-l'Amaury lies north of the Rambouillet Forest. It is located at the foot of low hills, at about 130 m above sea level. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47484596.en?toptext=1342479">More information</a> Municipality Château de Thoiry The Château de Thoiry is a 150-hectare castle, zoo and botanical garden that was opened to the public in 1965 in the village of Thoiry, France, with gardens and a zoological park. Located about 30 miles due west of Paris, it is best visited by automobile to take advantage of the drive-through lane. Its popularity has continued to grow—by 1974, over 280,000 visitors per year were coming to see an assortment of 1,000 wild animals. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47852882.en?toptext=1342487">More information</a> Castle Château de Groussay The Château de Groussay is located in the town of Montfort-l'Amaury, in the Department of Yvelines, west of Paris, in France. The Château was built in 1815 by the duchesse de Charest, a daughter of Louise Elisabeth de Croÿ-Havré, marquise de Tourzel, the governess of the royal enfants de France of Louis XVI and Marie Antoinette. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47852885.en?toptext=1342495">More information</a> Castle Garches Garches ) is a commune in the western suburbs of Paris, France. It is located 11.9 km from the centre of Paris.Garches has remained largely residential, but is also the location of Raymond Poincaré University Hospital, which specialises in traumatology, road accidents and physiotherapy. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47479758.en?toptext=1348214">More information</a> Municipality Fort Mont-Valérien Fort Mont-Valérien is a fortress in Suresnes, a western Paris suburb, built in 1841 as part of the city's ring of modern fortifications. It overlooks the Bois de Boulogne.Before Thiers built the fortress, Mont Valérien was home to hermits. Since the 15th century a community of hermits lived on the slope of Puteaux similar to the one of Chartreux: private cells, communal holy Mass and holy Office, perpetual silence. Manual labor and prayer divided the days equally. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/47856340.en?toptext=1348418">More information</a> Fortress Château de Villiers-le-Mahieu The Château de Villiers-le-Mahieu is a modernised castle in the commune of Villiers-le-Mahieu in the Yvelines département of France. It was built in the 13th century and was extensively remodelled in the 17th. It is now in use as a hotel. According to legend, the original castle was built by the English in the Middle Ages. The original 13th-century castle moats surround the château. In 1642, the Marquis Claude d'Attilly built the present Renaissance style structure on the remains of the original. It was restored in 1965 by the Comte de Rohan Chabot and was the home of the French Expressionist painter, Bernard Buffet, from 1971 to 1979. In 1980, a young hotelier, Jean-Luc Chaufour, began a process of establishing a top class hotel within the castle and its grounds. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/49188573.en?toptext=1349588">More information</a> Hotel Golf de Saint-Cloud Golf de Saint-Cloud is a 36-hole golf complex located in the parishes of Garches, Rueil-Malmaison and Vaucresson, 12 km west of central Paris, France.Opened in 1913 and designed by well renowned English golf course designer Harry Shapland Colt, the Vert or Green course is a championship course commissioned by Saint-Cloud's then owner, an American lawyer named Henry Cachard. The Estate was previously owned by Empress Joséphine, Napoleon's wife. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/4485698.en?toptext=1352687">More information</a> Golf Course Suresnes–Mont-Valérien station Suresnes–Mont-Valérien is a railway station in the town Suresnes, Hauts-de-Seine department, in the western suburbs of Paris, France. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/4485809.en?toptext=1352700">More information</a> Trainstation Pavillon du Butard The Pavilion du Butard is a hunting lodge in the Forêt de Fausses-Reposes in the territory of La Celle-Saint-Cloud in Yvelines, France. Part of the gardens of Versailles, it was designed by Ange-Jacques Gabriel for Louis XV and built between 1750 and 1754. It was made state property on 27 June 1794 by François-Nicolas Périgon, notary at Paris, during the French Revolution. On 23 April 1802 it became the property of empress Joséphine de Beauharnais, who wished to merge it with her Malmaison estate, but it returned to being state property on her divorce from Napoleon in 1809. It was later also enjoyed by Charles X of France and emperor Napoleon III of France. It was occupied by the Prussians during the Franco-Prussian War. Still state property, it was made a monument historique on 29 August 1927. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/50712735.en?toptext=5883070">More information</a> Monument Côte de Beule Côte de BeuleRouteYou Climb Code : <a href="//help.routeyou.com/topic/view/640" rel="nofollow" target="_blank">D_4_d</a><ul><li>Length : 3.21 km</li><li>Ascent : 145 m</li><li>Average grade : 4 m / 100 m - 4.25 %</li><li>Maximal grade : 5.84 %</li></ul> Author: <a href="https://www.routeyou.com/user/view/607725.en">Cols&Climbs@RouteYou</a> <a href="https://www.routeyou.com/location/view/51150023.en?toptext=7489268">More information</a> Slope Château de Bagatelle The Château de Bagatelle is a small Neoclassical style château with several small formal French gardens, a rose garden, and an orangerie. It is set on 59 acres of gardens in French landscape style in the Bois de Boulogne, which is located in the 16th arrondissement of Paris. The château is a glorified playground, actually a maison de plaisance intended for brief stays while hunting in the Bois de Boulogne in a party atmosphere. The French word bagatelle, from the Italian word bagatella, means a trifle or little decorative nothing. Initially, a small hunting lodge was built on the site for the Maréchal d'Estrées in 1720. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/51658769.en?toptext=8025648">More information</a> Castle L'Étang-la-Ville L'Étang-la-Ville ) is a commune in the Yvelines department in the Île-de-France in north-central France.L'Étang-la-Ville is served by two railway stations on the Transilien Line L: L'Étang-la-Ville and Saint-Nom-la-Bretèche–Forêt de Marly. Author: <a href="https://www.routeyou.com/user/view/165089.en">Wikipedia</a> <a href="https://www.routeyou.com/location/view/51661786.en?toptext=8028718">More information</a> Arrondissement Daubes 75 41 41 41 42 40 39 40 40 40 40 39 40 40 40 41 42 42 42 43 43 43 43 43 43 43 43 44 44 43 43 39 40 38 38 40 40 39 39 39 39 38 38 38 37 38 38 38 39 39 39 38 38 37 37 37 36 35 32 32 31 31 33 32 33 33 32 32 32 32 31 30 31 33 34 34 35 33 33 31 31 31 31 30 33 34 34 33 33 35 35 37 38 42 45 45 45 47 48 47 48 49 50 49 53 51 55 56 53 59 60 60 58 64 62 62 62 68 68 73 74 74 74 73 80 81 82 82 85 91 91 92 94 94 97 97 97 97 96 99 99 100 100 111 117 117 117 118 123 123 124 124 125 127 129 131 136 136 136 137 137 138 139 142 151 155 155 157 157 157 158 160 161 161 162 162 156 156 155 155 155 155 156 160 160 160 160 160 160 161 162 161 161 161 161 161 163 166 167 169 167 167 167 167 167 164 164 165 165 166 166 166 166 166 166 166 167 167 168 168 168 167 167 167 169 169 169 169 172 172 172 172 172 169 168 168 169 168 168 169 171 170 175 176 175 180 177 176 176 175 175 176 176 176 177 176 176 175 174 172 173 163 162 159 158 157 156 153 147 142 141 140 142 143 143 143 143 141 140 138 138 138 138 138 138 136 133 134 134 135 135 136 136 132 130 131 139 139 139 139 140 141 141 141 141 141 134 133 132 132 132 132 132 132 132 131 135 137 137 137 140 142 140 141 138 136 136 136 136 136 136 136 144 147 148 147 145 145 145 145 144 141 141 141 141 141 141 138 137 135 135 134 136 134 134 134 133 133 134 134 134 134 135 135 135 137 137 137 137 136 136 136 136 134 134 133 133 133 133 133 133 133 132 132 132 132 132 132 129 129 125 123 120 120 118 117 115 114 109 105 104 103 102 102 101 98 94 94 92 92 90 87 89 89 90 88 88 88 89 91 91 93 93 93 93 92 89 89 89 92 92 92 92 92 92 93 92 93 93 93 92 92 93 94 94 94 94 92 92 92 94 94 94 91 92 91 91 91 90 90 89 89 88 87 87 86 86 85 84 84 84 84 84 84 84 82 85 83 85 89 85 81 82 86 85 85 86 86 86 86 85 83 82 82 81 82 84 83 84 85 84 84 81 81 81 82 83 84 84 81 81 81 81 81 81 82 82 82 83 82 84 84 84 84 83 78 78 78 78 78 78 78 79 79 79 81 82 82 83 84 85 84 79 75 78 83 82 89 89 99 99 100 105 104 105 110 114 115 116 116 116 115 115 117 117 118 119 119 122 122 125 126 126 126 126 126 125 125 124 122 115 114 113 112 112 112 111 110 106 105 99 98 92 88 84 84 84 83 80 80 79 74 73 73 69 63 63 62 61 61 61 63 64 64 64 64 65 60 60 61 61 61 62 65 64 62 61 61 63 62 63 63 62 61 60 61 59 59 59 59 58 58 57 56 55 54 54 54 56 60 60 60 60 60 61 60 61 64 64 64 64 69 69 72 73 73 73 76 79 79 82 84 84 87 87 89 89 89 90 93 96 99 105 105 107 107 109 109 112 111 115 118 117 117 117 119 121 125 129 146 152 158 159 166 172 168 173 173 178 181 181 182 181 174 174 175 175 176 177 178 179 179 180 181 181 181 181 181 181 181 181 181 181 181 183 183 183 182 182 181 181 181 180 180 179 173 173 172 172 172 177 177 177 179 178 178 177 175 175 175 171 171 171 171 172 173 173 173 173 175 175 175 175 175 175 176 176 176 176 176 176 177 177 178 175 175 176 176 176 175 176 176 176 176 176 177 177 177 178 177 177 177 177 177 178 178 177 176 174 168 168 168 168 165 167 167 166 166 160 158 157 157 159 159 153 151 151 151 151 144 143 147 149 149 154 154 155 149 148 148 149 150 150 151 147 146 146 146 146 144 144 145 143 143 146 147 144 141 141 137 140 142 138 140 137 139 139 137 139 137 137 141 140 141 144 145 149 149 153 153 150 150 150 150 156 157 160 160 161 167 161 161 166 167 169 172 183 184 184 184 184 183 184 186 183 183 182 181 180 145 145 145 144 144 141 140 140 139 139 139 137 135 135 135 135 135 133 129 127 127 127 124 124 123 121 111 110 109 109 107 106 104 100 97 95 95 95 94 94 93 90 84 84 86 86 86 86 86 86 86 85 86 87 86 89 86 86 86 83 79 79 79 79 79 80 80 81 79 80 80 80 79 79 82 79 79 81 81 80 74 73 72 72 69 68 66 67 64 63 65 63 57 54 49 45 43 42 39 39 39 39 38 38 37 37 37 37 38 38 38 38 38 38 39 40 45 44 43 44 45 49 49 49 56 60 61 65 68 69 86 87 87 86 85 83 81 80 78 74 74 67 65 65 65 67 67 67 67 67 67 62 57 56 55 51 47 45 42 39 38 37 37 27 25 25 27 29 29 28 28 28 29 31 34 35 35 35 35 34 34 34 34 34 35 35 34 33 35 33 34 35 35 35 34 34 34 33 30 31 29 31 31 28 32 29 29 30 32 32 33 33 33 33 33 30 27 32 34 34 30 28 28 32 33 33 30 29 28 29 29 29 29 26 28 28 28 29 29 29 30 30 31 32 32 34 34 35 35 38 39 43 44 44 46 46 47 47 52 53 57 66 79 83 87 89 90 91 91 91 94 94 94 94 95 95 99 106 106 110 114 113 113 115 112 115 114 114 117 116 116 117 117 116 116 116 116 117 121 125 126 126 114 93 93 93 93 93 94 105 111 111 111 110 109 109 109 105 105 105 102 101 96 89 87 82 81 77 77 77 77 77 76 77 76 73 68 66 66 47 44 45 45 45 45 45 44 39 39 37 34 33 33 34 34 33 31 31 31 31