This is a 3d model of the terrain of Squaw Valley Ski Area in California's Lake Tahoe. The ski lifts superimposed on the mountains. It is set up as a dual extruder print with the lifts printing in a contrasting color. But if you only have a single extruder machine you can print the "squawnolifts" file and the lifts will print as slots in the model which marks them just as well.
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/