Champenay is well known for its quartzite sandstone quarry. This a red sandstone with white veins, known as "Princes sandstone", in reference to the region's former status as the Principality of Salm. At the trail's summit (the crest between the Col du Hantz and the Chemin des Allemands) are the old border posts between France and Germany dating from 1870-1918. Lastly, the trail goes through the refreshing Falle valley and past the lake of the same name.