So these guys in Tennessee had a cave under their house right. The entrance was through a secret hydraulic door in the garage that led to a concrete ramp that went about 50 yards into the ground. Inside the cave were living quarters and a secret escape hatch that led through a tunnel that exited via another hydraulic door that opened up a rock on the outside. Their setup resulted in multimillion dollar harvests every sixty days. Cops were working on nailing these guys for five years before eventually obtaining a warrant. Check it out.