Underground mills
A factory inside a cave!
Bring your friends or family to explore the Col-des-Roches underground mills at Le Locle. Experience a unique adventure.
The cave at Col-des-Roches was formed by water running through the valley of Le Locle. In the mid 17th century, some remarkable equipment was installed in it. Ingenious millers transformed the cavern and carved out the rock to harness the power of an underground waterfall. They designed an impressive system of interconnected hydraulic wheels to power mills, threshing machines and saws. This was how the underground mills at Col-des-Roches were born. The converted cave and museum tell visitors their story.
Open between 10 a.m. and 5 p.m. every day from May to October
November to April: Tues to Sun, 2–5 p.m.
More information: www.lesmoulins.ch
Underground mills
Col 23
2400 Le Locle
+41 32 889 68 92
Additional information
Buy ticket
Buy your ticket from the SBB Shop or SBB Mobile app. You can also buy a ticket from the driver, at all ticket terminals, PostBus sales offices and at the counter of your nearest railway station.
Additional ticketing apps and online shops can be found in our overview.
Timetable / travel information
You will find the entire Swiss public transport timetable online here.
Travel there by Postbus, line 21.381 Le Locle – La Brévine as far as the “Le Locle-Col-des-Roches, gare” stop.
Reservations
For groups of ten people or more, reservation is required by 12 noon the day before at the latest by calling 0848 40 20 40 from Monday to Friday, 8 a.m.–12 noon and 1–5 p.m. For visits on Saturdays, Sundays, Mondays and public holidays, notice must be given by 12 noon on the preceding working day.
Wheelchair accessibility
Wheelchair accessibility is not guaranteed in the Postbus
Notice must be given at the latest 24 hours in advance by calling 0848 40 20 40 from Monday to Friday, 8 a.m.–12 noon and 1–5 p.m. For visits on Saturdays, Sundays, Mondays and public holidays, notice must be given by 12 noon on the preceding working day.