 On there are questions about why it has all those chimneys in the ceiling if its sole purpose was to house farm animals, hay or food which would not have needed that much daylight and certainly no smoke-spewing fireplaces.No archaeological remains have been found in the cave which can support theories about its origin in one way or another.It is however quite clear that Hellnahellir is made by man, dug out of sandstone with the primitive tools of the time when it was made.