10 Least Visited National Parks

The National Park Service is celebrating its 100th anniversary this week, and you can mark the occasion by visiting Great Smoky Mountains National Park, which spans North Carolina and Tennessee. With 10 million annual visitors, it is by far the most visited of all the national parks, notes National Geographic. But if sparser crowds are your thing, this list from 10best.com runs down the parks with the least number of annual visitors:

1. Gates of the Arctic, Alaska (11,000)
2. Lake Clark, Alaska (18,000)
3. Isle Royale, Michigan (19,000)
4. North Cascades, Washington (21,000)
5. Katmai, Alaska (38,000)
6. Dry Tortugas, Florida (71,000)
7. Wrangell-St. Elias, Alaska (80,000)
8. Congaree, South Carolina (86,000)
9. Great Basin, Nevada (116,000)
10. Guadalupe Mountains, Texas (170,000)

Click for more on what makes these parks special. (More National Park Service stories.)