A Spacious Iron Mine                                   -      -      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      -      -

This dark and stuffy mine is stunningly tall and just as wide.  Large
fragments of rock have fallen to the ground throwing up a constant cloud of
dust.  Loose dirt covers a long railway that is used as a track for a mine
cart.  The miner's clubs loudly echo through the mine and no wind blows
through the entrance to the east, making it hard to breathe. 
A hill giant is mining iron by attacking the wall with his club.