We have explored the local heavens and most of planet Earth, but what lies underneath the Earth? Mankind has been fascinated by the prospect of subterranean realms through history and now a group of brave explorers intends to find out the truth. Whether it's the Christian Hell, the Jewish Sheol, the Mesopotamian Mashu or the Celtic Cruachan, legends of whole worlds beneath the surface have populated the legends, literature, religions and myths of cultures worldwide. Now, using the newest, most technologically advanced instruments known, we may finally know the literal truth behind these tales. Download and start listening now!