#1 Great Smoky Mountains National Park |
#2 Grand Canyon National Park |
#3 Yosemite National Park |
#4 Yellowstone National Park |
#5 Rocky Mountain National Park |
#6 Zion National Park |
#7 Olympic National Park |
#8 Grand Teton National Park |
#9 Acadia National Park |
#10 Cuyahoga Valley National Park |
Our thanks to the National Park Service for all images.