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). There are three lakes in the Vallee de Joux : the lac de Joux (around 6 miles (10 km) long), the lac Brenet and the lac Ter. The border with France is all along the north part of the valley. There are three main municipalities in the valley, Le Chenit, Le Lieu and L'Abbaye forming the district of La Vallee. These include ten villages like: Le Sentier, Le Brassus, Le Pont, ...The Vallee de Joux is with Neuchatel, the birthplace of the Swiss horology and still home of the most famous swiss watch factories, like Audemars Piguet, Blancpain, Claude Meylan, Patek Philippe & Co. and Vacheron Constantin.