1. The Wave, Arizona
2. Great Sand Dunes National Park and Preserve, Colorado
3. The Badlands National Park, South Dakota
4. Dry Tortugas National Park, Florida
5. Upper Missouri River Breaks National Monument, Montana
6. Cathedral Gorge State Park, Nevada
7. Congaree National Park, South Carolina
8. Fossil Creek Wilderness, Arizona
9. Kasha-Katuwe Tent Rocks National Monument, New Mexico
10. Apostle Islands National Lakeshore, Wisconsin
11. Crater Lake National Park, Oregon
12. Cuyahoga Valley National Park, Ohio
13. Pictured Rocks National Lakeshore, Michigan
14. Cedar Breaks National Monument, Utah
15. Ozark National Scenic Riverways, Missouri