An Underground Swamp                                   -      N      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

As you slosh through the wet bog, your foot seems to sink deeper with
each step.  The whole swamp seems to be floating on a giant underground
lake, filled long ago.  The plant-life is very odd, having no green at all,
being totally white.  Strange insects and animals creep past you wandering
blindly looking for food.  Something must be feeding these creatures and
hopefully it isn't dead adventurers.  
The guardian of the swamp territory stands here blocking your path.