A Dimly Lit Tunnel                                     -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      -      -

You are walking along a darkened tunnel.  The walls are roughly hewn as
though little care was taken to carve this tunnel from the solid stone
surrounding it.  A bright golden light beckons you through a crack in the
tunnel wall to the west.  The muffled sound of running water filters through
the crack.