A Foggy Tunnel                                         -      -     NE 
(-------------------------------------------------)     - <---(M)---> -
                                                        SW     -      -

You are walking down a foggy tunnel.  The tunnel heads diagonally,
apparently heading somewhere.  The fog is thick on the floor and lighter
above your waist.  You look to the walls and see strange drawings and
writings.  You see darkness ahead, and you look to your someplace where you
appear to know where you are.  You think of what might be roaming around on
the ground.