A pleasant walk one hour from Paris to discover an old sandstone quarry.
The "sentier des Maréchaux" is a forest path marked out in the park of the Vallée de Chevreuse. The walk is nice without being exceptional, you walk in the middle of old sandstone quarries and many panels allow you to discover the life of the workers at the time. You will learn about the different stages of sandstone formation. From this walk you can reach the Abbey of Cernay and the famous waterfalls of Cernay are not far either. It is a good way to discover this part of the Chevreuse Valley.