A rather compact map of Imp and Gnome Mine

          *-*-*-*
          *     *-*-*
    *-*-*-*-*-*-*   *
    *-*         * *-* <-(gate to ice plane)
    *-*-*-*-*   *
        *   *   *-*-*
    *-*-*   *   *   *
*-*-*   *-*-*-*-*   *
    *       *       *
    *-*-*-*-*-*-*-*-*
      *-*
      *
               drawn by Aa

The exit from the mines is up from the four way
intersection in the middle of the map.