Photo: Jacob W. Frank/NPS, Bison Crossing the Road Key dates: The United States Congress established Yellowstone National Park in 1872. On March 1, 1872, President Ulysses S. Grant signed the Yellowstone National Park Protection Act into law. The world’s first national park was born. Key Links http://www.nps.gov/yell Facebook: YellowstoneNPS Flickr: YellowstoneNPS Twitter: @YellowstoneNPS Periscope: YellowstoneNPS Slideshare Yellowstone National Park … Continue reading Yellowstone National Park