Slideshow: 10 most popular national parks

Published On: Jun 11 2013 09:53:39 AM HST   Updated On: Jun 14 2013 05:20:22 AM HST

Grand Canyon NPS

On January 11, 1908, U.S. On January 11, 1908, U.S. President Theodore Roosevelt declares the massive Grand Canyon in northwestern Arizona a national monument.

Planning a trip to a national park this summer?  You may not be alone. Americans made millions of visits to national parks in 2012.

View the top ten most-popular national parks in American.


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