Le Day railway station

The Le Day viaduct (viaduc du Day) is a railway viaduct in Vallorbe in the Jura-Nord vaudois District of the Swiss canton of Vaud. It stands near the hamlet of Le Day and crosses the Orbe. This has been dammed since 1955 by the Le Day dam (Le barrage du Day), which lies 450 m downstream. The double-track bridge is used by TGV Lyria services between Paris and Lausanne on the Lausanne–Vallorbe line of the RER Vaud (Réseau express régional vaudois) and the line from Vallorbe to Le Pont in the Vallée de Joux with its extension to Le Brassus.

Vallorbe (French pronunciation: [valɔʁb]) is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Ballaigues is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Vallorbe railway station (French: Gare de Vallorbe) is a station at the border of Switzerland and France on the TGV Lyria line between Paris and Lausanne. It is located at the south-eastern entrance of the tunnel which tunnels one of Jura's mountain ranges, Le Mont d’Or. The station serves the municipality of Vallorbe, in the Canton of Vaud, Switzerland. Opened in 1915, the station is the south-eastern terminus of the historic French Dijon–Vallorbe line, and the north-western terminus of the historic Swiss Simplon line (Vallorbe–Domodossola). It is also the terminal station of the hourly running, suburban train S2 to Lausanne and further to Palézieux. Finally, it is also a junction for the short line to the south-western end of the Vallée de Joux, also running on an hourly frequency and connects to the historic Chemin de fer Pont-Brassus between Le Pont and Le Brassus, which nowadays is owned by travys (Transports Vallée de Joux - Yverdon-les-Bains - Ste-Croix). The line between Vallorbe and Le Brassus is operated by CFF. The railway station (as well as the line between Vallorbe and Le Pont) is owned and operated by CFF. They are all part of the integrated mobilis (canton of Vaud) fare network. It is listed as a Swiss heritage site of national significance (class A).

Vaulion is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Mont d'Or (French: Le Mont d'Or) is a mountain of the Jura, located in the French department of Doubs and extending into the Swiss canton of Vaud. Its main summit is 1,463 metre-high and lies within France, 500 metres north of the border with Switzerland (1,380 m). The mountain is located between Jougne, France and Vallorbe, Switzerland. Mont d'Or is notable for its limestone cirque on the east side. Near the highest point of the Swiss border is the Cabane du Mont d'Or, a mountain hut owned by the Swiss Alpine Club. In winter, Mont d'Or also includes a ski area within France. Several ski lifts are located on both west and east sides of the mountain.

Lignerolle is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Premier is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Juriens is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

The Dent de Vaulion is a mountain peak of the Swiss Jura, overlooking the lake of Joux and Vaulion in the canton of Vaud. A small ski resort is located on its slopes. The municipality of Vallorbe is located on the mountain's foothills.

La Praz is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

Les Clées Castle is a castle in the municipality of Les Clées of the Canton of Vaud in Switzerland. It is a Swiss heritage site of national significance.