Old TR himself laid the cornerstone of this magnificent arch in 1903. It served for years as the North entrance of Yellowstone National Park. Today it stands a few hundred yards from the gift shop clogged entrance road. While I was photographing it they were preparing to re-pave the road through the arch so it may be back in use someday soon. We talked about this and lots more cool stuff on the 3D Printing Today podcast available on iTunes, or Stitcher radio learn more at http://www.threedprintingtoday.com/