The Achlys Cabin could be mistaken for the Perses one, except it's literally smoking. Plumes of dark smoke rise into the air above the roof, dissipating into the sky. Black fog coils just a few inches above the ground, both inside and outside. The cabin is stone, an unremarkable-looking shade of grey, with broken windows and a cracked door. A dreadful sense of hopelessness and failure surrounds it. No wildlife would ever be seen nearby. Nothing alive at all passes around the cabin, save the children of Achlys themselves. When wind passes through the cabin, it sounds disturbingly like wailing. The interior is minimally decorated, with moth-eaten sheets on the bunks and rusty bed frames.[1]

  1. Achlys cabin description from the Cabin Description topic on Demigod Power.