It is said that due to the high altitude (around 1000 m above sea level) this valley was closed off through the long winter, and the local population could not be engaged in agriculture. Therefore they began making watches. Unlike the Jura triangle and La Chaux-de-Fonds/Le Locle area, which mass-produce many watches, the Vallée de Joux is focused on complications and high-end watchmaking.
The name of the valley corresponds to the lake located here, “Lac de Joux”, the largest lake in the Jura Mountains.
Important places in the Vallée de Joux connected with the watchmaking, listed counter-clockwise around the Lac de Joux: