The walls were straight and finely hewn in the direction they traveled, straight down if they had been outside.  The noise grew louder as they walked, and the walls became increasingly discoloured with the residue of some liquid and patches of fungal growth.  After they had traveled roughly two hundred feet things suddenly changed.<br/><br/>On the floor were a dozen shriveled up snake-like objects.  The walls, floor, and ceiling around the objects were pock-marked with holes an inch or two wide.  There were hundreds if not thousands of them covering the walls as far as they could see.  The snake-like objects looked to have been cut in half, though all of them seemed to be the head and not the tail.  The holes were widely spaced enough that, unless things were hollowed out, it seemed unlikely the floor would fail if they stepped on it.