A Nicely Lit Hallway                                   -      N      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      S      -

There is a corridor to the west that leads to a staircase.  The passages
to the north and south look well lit and rather safe to travel through.  You
figure that you will come upon more doors similar to the strange ones you
have already encountered if you take the northern or southern passage.  The
western one, however looks interesting as well.