4story (2011) where is the underground labyrinth?

Hi, I've been playing 4story for about a week now, and I've come across a quest that gives truck-loads of exp, but you're not allowed to use the auto-tracking Thingy. I'm in craxion, and I was assigned to the quest by scotch, by Arian road/stone workshop. I have to kill 15 experimental humans. If anyone knows where the labyrinth is, I would be truly grateful :D thanks for reading, hope to read some answers soon!!