The underworld, a world unknown by any living person, is imagined as an extension of our own world but perversely altered. It exists in a parallel universe–a magical place that obeys the laws of conventional, three dimensional space but yet cannot be accessed save by passing through the transformation of death. Like a mirror to our own world, the underworld is often depicted as an inverted reflection of our living realty. An inverted torch, a window that slides open from the top, a bed that clings to the ceiling.