The following account was recorded in the agent's log during your transmission: Dark, damp cave air fills my lungs as I face the end of a colossal, partially built tunnel boring machine half-buried in rough, exposed granite. It's late morning judging from the angle of the sunlight barely seeping through a narrow, winding airshaft above, umm, the air smells like damp rock, oil, and grease. The machine's mangled drilling bits and massive support columns are... steadily transforming into gnarly, living roots, blending seamlessly into the bedrock as the machine itself silently disappears into the solid stone.