The National Park Service turns 100 today. In 2009, 320 million people, nearly equal to the entire population of the United States, visited one or another of the 413 parks, monuments, battlefields, recreation areas, and historic sites. The annual budget for the Park Service is about $3 billion.
|1916 map of the then-existing national parks and railroad routes to them, in a time when paved roads were still very few and far between. Click to enlarge.|
|1938 poster for Yellowstone National Park.|