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en.wikipedia.org/wiki/List_of_national_parks_of_the_United_States

The United States has 59 protected areas known as national parks that are operated by the National Park Service, an agency of the Department of the Interior.

www.nps.gov/findapark/index.htm

Find a national park by selecting from a list or choosing a state on the map.

www.nps.gov/planyourvisit/fee-free-parks.htm

On certain days each year, the National Park Service offers free admission to all national parks.

www.nps.gov

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

www.nationalparks.org/explore-parks

Explore America's national parks. Discover our most treasured places, supported by people like you, and start your travel planning here.

www.nationalparks.org/explore-parks/all-parks

As the official charitable partner of the National Park Service, we provide resources for the national parks. Support this uniquely American idea.

www.nationalparks.org

As the official charitable partner of the National Park Service, we provide resources for the national parks. Support this uniquely American idea.

www.pbs.org/nationalparks

THE NATIONAL PARKS: AMERICA'S BEST IDEA is a six-episode series on the history of the national parks, directed by Ken Burns and written and co-produced  ...

www.facebook.com/nationalparkservice

National Park Service. 1M likes. America's Best Idea.