A Stone Archway Leading Into a Huge Gallery            -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      -      -

This hallway stretches out into an enormous gallery.  The ceiling is lost
from view in the abundance of shadows, several hundred feet above you.  A
forest of redstone columns, as thick as tree trunks, rise up from the ground
and are also lost in the darkness.  The floor is smooth, as if it has been
worn down by many generations of feet.