The line goes through a number of serpentines and turning tunnels
in order to gain height.
(Map from Uppfinningarnas bok. GIF-image, B/W, 213k, 3084x1036 pixels).
It is shown here with half resolution. If you save the image file to your
hard disc,
you can use some image program to zoom and move more easily.
Click here to look at the image in full
resolution (hopefully, no re-loading!).