An Underground Glade                                   NW     N      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        SW     S      -

This glade is amazing.  It seems that someone has created a large forest
underground, and filled it with life.  The cavern is very large, and tall. 
You must be farther underground then you expected for the height of the
ceiling.  Amongst the stalactites is a strange glowing moss, which serves to
illuminate the whole area.  The glade continues to all the westerly
directions, and to the north and south.