Insurmountable obstacles for some, irresistible playgrounds for others: America's mountains mesmerize and captivate curiosity seekers around the world with their magnitude, beauty, and mystique.

From the fog covered forests of Great Smoky, to the colorful walls of the Grand Canyon and the explosive geysers of Yellowstone, National Parks in the U.S. all have powerful stories to tell and cry out to be seen from above.