The shaft goes right through the earth and links the two continents of mystic adventure in a shortcut!

                                                   +----+
                                   Greenstone      |    |
  +----+                                 Road 1----+----+
  |    |                                           |    |\
  +----+----+----+----+----2 Great                 +----+ +
 /|    |                     Ocean                       /
+ +----+                     Connector                  +
 \                                                     /
  +                                                   +
   \                                                 /
    +                                               +
     \                                             /
      +                                           +
       \                                         /
        +                                       +
         \                                     /
          +                                   +
           \                                 /
            +                               +
           /                                 \
          +                                   +
           \                                 /
            +                               +
             \                             /
              +                           +
             /                             \
            +                               +
           /                                 \
          +                                   +
           \                                 /
            +                               +
             \                             /
              +                           +
             /                             \
            +                               +
             \                             /
              +                           +
               \                         /
                +                       +
               /                         \
              +                           +
               \                         /
                +                       +
                 \                     /
                  +----+----+----+----+

1 - Greenstone Road {all}
2 - Great Ocean Connector {All}

Key to Mystic Adventure ASCII Maps