Acadia National Park – Maine
Arches National Park – Utah
Badlands National Park – South Dakota
Bryce Canyon National Park – Utah
Cape Hatteras National Seashore – North Carolina
Carlsbad Caverns National Park – New Mexico
Crater Lake National Park – Oregon
Death Valley National Park – California
Denali National Park and Preserve – Alaska
Everglades National Park – Florida
Gettysburg National Military Park – Pennsylvania
Glacier National Park – Montana
Grand Canyon National Park – Arizona
Grand Teton National Park – Wyoming
Great Smoky Mountains National Park – Tennessee and North Carolina
Lewis & Clark National Historic Trail – the Mid-West and West
Mammoth Cave National Park – Kentucky
Mesa Verde National Park – Colorado
Mount Rainier National Park – Washington
Redwood National and State Parks – California
Rocky Mountain National Park – Colorado
Yellowstone National Park – Wyoming, Montana and Idaho
Yosemite National Park – California
Zion National Park -- Utah

Images courtesy of National Park Service (Acadia and Rocky Mountain National Parks)