An underground cavern that has been maintained from the days of the Imperator. It has entrances from every region, though no one knows why this is so. This location has one area. It is missable! To gain access talk to the Knowledgeable Yama in Virtus Parish in Athlum once Rush's parents have nominated an ambassador to the Academy. It can also be reached by passing through The Third Path and The Final Fortress (Note: the eastern section of this location can only be accessed this way). This location ends up with a dead end in [[The Final Fortress#Second <-> Third|The Final Fortress]].