This higher wall allows for surveillance of the entire area south of the massif, and gaps between the rocks are filled in with masonry. It is here that Paul Pascon thought he recognized four towers—there is, in reality, only one construction that can be called a tower, the bastion at the northern end of the low wall. A separate wall surrounds the area in front of the low wall, at a distance of about 100 m (330 ft); most of the foundations of this wall have disappeared.