13 of the most beautiful and popular National Parks in the United States. Yosemite (0:01), Zion (2:34), Canyonlands (4:58), Bryce (7:22), Rocky Mountain (10:02), Crater Lake (12:32), Arches (15:02), Great Smoky Mountains (17:44), Grand Teton (19:35), Yellowstone (21:35), Olympic (24:29), Glacier (25:56), Grand Canyon (28:16).