Across
- 2. Kobuk National Park
- 5. Voyageurs National Park
- 8. Saguaro National Park
- 12. Crater Lake National Park
- 13. Badlands National Park
- 15. Yellowstone National Park
- 16. Great Basin National Park
- 17. Yosemite National Park
Down
- 1. Acadia National Park
- 3. Haleakala National Park
- 4. Isle Royale National Park
- 6. Theodore Roosevelt National Park
- 7. Olympic National Park
- 9. Cuyahoga Valley National Park
- 10. White Sands National Park
- 11. Hot Springs National Park
- 14. Guadalupe National Park