A very dark tunnel(s and n)
This is a very smooth cut tunnel. The floor has been worn by the feet of generations of Dwarves. The walls are lined with torches that burn low so it won't hurt the sensitive dwarven eye, but gives enough light for visitors to be able to walk around without depending on a torch. You can tell the tunnel is more a path through the Dwarven village than a tunnel to a mine.
The only obvious exits are south and north.