Ecublens is a municipality in Switzerland in the canton of Vaud, located in the district of Ouest lausannois.

Preverenges is a municipality in the Swiss canton of Vaud, located in the district of Morges. It is a Suburb of the city of Lausanne.

Rolle is a municipality in the Canton of Vaud in Switzerland. It is the seat of the district of the same name, and is located on the northwestern shore of Lake Geneva.

The Vallee de Joux is a valley of the Jura Mountains in the swiss Canton of Vaud. It is located at 20 miles (50 km) North from Geneva and Lausanne, its mean altitude is over 3300 feet (1000 meters).