Natural reserve, classified as a high marsh of national importance, in the heart of the village of Le Sentier.
The Sagne du Sentier is a peat bog classified in the federal inventory of high marshes. Exploited until the 1940s for its combustible peat, it is now protected. Footbridges on stilts wind between the five ponds that were reactivated by the Pro Natura association in 2018. A rejuvenating stroll just a few minutes from the center of the village of Le Sentier.