Though not a continent, the Tunnel World in many ways functions as one. The only distinguishing factor is that it is entirely underground. Though no civilization seems to have originated here, several have moved here, typically seeking shelter from enemies or the nature of the surface world. It is believed that the Tunnel World connects Drentae to Koaluckssie and eventually to certain portions of the Great Archipelago. No one has been able to find passage to Hughijen or Sulnuun through the underground labyrinths.