A Chartreuse Tunnel                                    -      N      - 
(-------------------------------------------------)     - <---(M)---> E
 WARNING: You are in a NEUTRAL PLAYER KILLING room.     -      -      -

As you continue down the tunnel, the hideous yellowish-green shade of the
rock begins to grow even brighter.  There is obviously some kind of magic at
work here, since these passages seem to shift and change as you follow them.
Such tunnels could not have been created by hand, and you wonder what will
be found deeper inside.