Jagged Tunnel                                          -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      -      -

This tunnel is lined with stalagmites and stalagtites.  There are also
numerous rocks jutting out of the walls that make passage very difficult. 
The tunnel itself is set about 10 feet above the lava below and the
temperature is much cooler.