And it is not only the works of human hands that waste away, nor only structures raised by human skill and industry that the passing days demolish. Mountain massifs crumble away, whole regions have subsided, the waves have covered landmarks once far out of sight of the sea. The immense force of volcanic fires that once made the mountain-tops glow has eaten them away and reduced to lowly stature what once were soaring peaks, reassuring beacons to the mariner. The works of nature herself suffer.