"Instagramming" Across America's National Parks in 1972

The only good thing to come out of the two week-plus U.S. government shutdown last month was the attention it brought to the national parks, the importance of them to the local economies that depend on them, and the global inspiration that every country trying to conserve its natural resources derives from the creation of them, “an idea as uniquely American as the Declaration of Independence and just as radical,” as Ken Burns put it in his 2009 TV documentary The National Park…