A Dark Underground Tunnel                              -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

The corridor suddenly becomes a tunnel which looks like it was chipped
away over many years by the patrons of this once holy area.  The ceiling is
rounded and roughly cut leaving many jagged rocks hanging down from above. 
The floor is also rough with a few holes created by drips of water that have
hollowed out small holes in the floor, although presently there is no water
on the ground.