This 3d topo shows Yosemite's glacier point ski trail. In the summer this 10.5 mile stretch of road is choked with tour buses. In the winter you can strap on your skis and have it all to yourself.
The top of the line which marks the trail is flat across the highest elevation on the trail. That way the changing height of the line clearly shows up and down grade of the trail, useful info when you are on skis.
This thing was featured on the 3D Printing Today podcast available on iTunes, Stitcher radio or direct from the source at http://threedprintingtoday.libsyn.com/