Link to PHOTO ALBUM:
If the Grand Canyon were in Europe, there would be roads going up and down it, and tunnels, and people living at all elevations on it. Such is the way of the world.
Passo de San Baldo is referred to as the "High Water Mark" of the Austrian Advance into Italy during World War I. The Austrians got down over the ridge, but there were no roads for re-supply, so they built one. They carved the road back and forth down the side of the cliff, but there was no room at the ends for the hairpin turns, so they built tunnels. The tunnels go into the mountain, turn around and come back out. They are stacked five or six deep. There is nothing quite like leaving the bright sunshine and going into a dark wet narrow tunnel on a bike, then having to do a hairpin turn inside.
There is a link to a video at the bottom of this page.
And they seemed to glue the road to the side of the mountain.
Cable Cars where roads aren't worth it.