Marker 8On either side of the trail, the rock face has been hewn: we are in the inner ditch of the castle. Verfeuil’s role was above all defensive. The castle, built on a rocky spur, blends into the rock, which has been worked to ensure its defence. The only side that is not protected by the natural sheer slope has two parallel ditches cut into the schist. Beyond the outer ditch, traces of the rutted track can be seen. According to the archaeologist Michel Lorblanchet, this castle, like others, may have been built on the site of a protohistoric oppidum (a fortified habitation predating the Roman conquest).