Updated, new in bold.
United States:
1. Yellowstone, Wyoming
2. Zion, Utah
3. Bryce Canyon, Utah
4. Grand Canyon, Arizona
5. Yosemite, California
6. Badlands, South Dakota
7. Grand Teton, Wyoming
8. Sequoia, California
9. Petrified Forest Arizona
10.Great Smoky Mountains, Tennessee
11.Theodore Roosevelt, North Dakota
12. Hot Springs, Arkansas
13. Wind Cave, South Dakota
14. Acadia, Maine
15. Great sand Dunes, Colorado
16. Joshua Tree, California
17. Saguaro, Arizona
18. Shenandoah, Virginia
19. Mammoth cave, Kentucky
20. Cuyahoga Valley, Ohio
21. Indiana Dunes, Indiana *
22. Gateway Arch, Missouri *
•MT Rushmore NM, South Dakota
International:
Sanjay Gandhi , Mumbai, India
Arenal Volcano , La Fortuna, Costa Rica
Manuel Antonio, Quepos, Costa Rica
Carara,Costa Rica
Plitvice Lakes, Croatia
Iguazú, Puerto Iguazu, Argentina
Iguaçu, Foz do Iguaçu, Brazil
Soberanía, Panama
Portobelo, colon, Panama
Metropolitan NP, Panama city,Panama
Masada, Israel
Ein Gedi Antiquities,Israel
Yarkon, Israel