Inside A Small Cave                                    NW     N     NE 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

From the moment you enter this small chamber you can tell that something
is wrong.  The walls seem to shimmer and shift before your eyes, and even
the air seems somewhat distorted.  It is almost like you are having some
kind of strange dream, and you suspect that this is what it would be like to
see a part of the astral plane.  There must be a quite powerful creature
nearby in order for reality to be disturbed in this manner.