America's 10 Most Visited National Parks

10. Joshua Tree National Park // 2.4 million

9. Olympic National Park // 2.5 million

8. Acadia National Park // 2.7 million

7. Cuyahoga Valley National Park // 2.8 million

6. Grand Canyon National Park // 2.9 million

5. Grand Teton National Park // 3.3 million

4. Rocky Mountain National Park // 3.3 million

3. Zion National Park // 3.6 million

2. Yellowstone National Park // 3.8 million

1. Great Smoky Mountains National Park // 12.1 million