A Small Depression                                     -      -      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

You are walking through a narrow, circular tunnel leading into the depths
of the mountain.  The edges of the corridor are very smooth, almost as if
they had been melted away.  It is becoming more and more obvious that these
tunnels were originally conduits for flowing lava, which proves that
Hellbent Mountain must indeed be a volcano.  You hope that there isn't going
to be an eruption any time soon, or else you could be in some serious
trouble.