2010
Everglades National Park
Death Valley National Park
Yosemite National Park
Saguaro National Park
White Sands National Monument
Carlsbad Caverns National Park
Aztec Ruins National Monument
Grand Canyon National Park
Bryce Canyon National Park
Zion National Park
Mammoth Cave National Park
2011
Mesa Verde National Park
Devils Tower National Monument
Redwood National Park
Mount Rainier National Park
Arches National Park
Canyonlands National Park
Grand Teton National Park
Yellowstone National Park
Glacier National Park
Craters of the moon national monument and preserve
Point Reyes National Seashore
Muir Woods National Monument
Kings Canyon National Park
Joshua Tree National Park
Cabrillo National Monument