6 Incredible National Parks You Have to Visit
It's not all about geysers and mule rides out there. A few less familiar things to do...
Photo: Michael Reaves/The Denver Post/Getty Images
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Think of a sandboard as a slick-bottomed snowboard—and then picture yourself using one to shred North America’s tallest sand dunes (up to 750 feet). Nervous types, fear not: You can also get your kicks on a sled.