Steam-Filled Room                                      -      N      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

The walls of this chamber are rough and rocky, and its curved ceiling
extends quite a ways above you.  However, the odd thing about the room is
that it is almost completely filled with steam seeping in from the many
cracks and fissures in the ground.  There must be water leaking into the
cave somewhere, but a great deal of heat must be present to vaporize it like
this.  Perhaps Hellbent Mountain really is a volcano after all.