A Large and Spacious Tunnel                            -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

You are walking down a large and spacious tunnel.  The slightest of
sounds echos off the tunnel walls.  Strange writings and pictures are drawn
onto the tunnel walls.  Your feet are slightly cushioned as you walk across
the bunches of ash.  The air here is thick and filled with ash and other
particles, causing you to cough.  The tunnel continues on to the north.