1. American Wonders Aurora Borealis

2. Grand Canyon Arizona 446 km long 6.4 to 29 km wide Up to 1.83 km deep 2 billion years old

3. Carlsbad Caverns New Mexico 230 k below surface

4. Mammoth Cave Kentucky Largest cave system in the world – 214 sq. km

5. Yellowstone Wyoming 8,983 km Active volcano

6. Painted Desert Arizona Vast desert

7. Petrified Forest Arizona 885 square km

8. Badlands South Dakota 25.958 square km

9. Glaciers Alaska 100,000

10. Mt. Kilauea Hawaii Largest active volcano On big island of Hawaii

11. Mohave Desert California, Nevada, Arizona, Utah 57,000 km

12. Great Lakes Minnesota, Wisconsin, Illinois, Indiana, Ohio, Pennsylvania, New York Huron, Ontario, Michigan, Erie and Superior. Gouged out by glaciers.

13. Niagara Falls New York Strongest falls in North America Canadian border Up to 53 meters high

14. The Everglades Florida Subtropic wetlands 300 square km

15. Bayous Louisiana, Texas, Alabama, Georgia Marshy lands Louisiana, Texas, Alabama, Georgia Marshy lands

16. Blue Ridge Parkway Virginia, North Carolina Longest National Park – 755 km

17. Monuments St. Augustine, Florida

18. Mount Rushmore South Dakota Washington, Roosevelt, Jefferson, Lincoln Each head, 18 m 1927 - 1941 South Dakota Washington, Roosevelt, Jefferson, Lincoln Each head, 18 m 1927 - 1941

19. Gateway Arch Missouri Symbolizes entrance to West 1965 200 m high

20. Golden Gate Bridge California 1937 Then-largest suspension bridge

21. Arlington Cemetery Virginia Once home to Robert E. Lee

22. Hoover Dam Arizona, Nevada 1935 Then world’s largest concrete structure

23. Statue of Liberty New York 1886 92.99 m tall