Visiting All 397 National Parks Units - Terre Jones

Many Americans think of their national parks as the few parcels of pristine land across the country with names like Yosemite, Denali and Arches. But most people would be surprised to discover that there are actually 397 national park units in the United States. Terre Jones, outgoing President and CEO of Wolf Trap Foundation for the Performing Arts (itself a parcel of the National Parks Service), has been to 213 of them to photograph for his new book, Roadtrip: A Photographer's Journey to America's National Parks.