Dust Filled Corridor                                   -      N      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

This area is rarely used.  The floor is covered in an inch thick of dust.
Heavy webs cover the ceiling, but they are at least 20' feet in the air. 
The dust and dirt collected on the strands of spidersilk show that any
monster which made them is probably no longer here.