Broad Corridor                                         -      N      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

This large corridor has been cut from sandstone and granite deposits. 
Every 10 feet an oil lamp has been placed.  Large wooden beams help support
the weight of the corridor as it weaves its way through the rock.  
A harpy is waiting for its prey here.