A Winding Tunnel                                       NW     -      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

You are walking through a small tunnel that leads deeper into Hellbent
Mountain.  Unlike the passage you traveled through earlier, the walls here
are rough and rocky, and look like they formed over a long period of time. 
It seems that the caves may not have been formed by volcanic activity after
all, but you notice that the chamber to the south seems to be filled with
steam, and wonder where it could possibly be coming from.