The USA trivia

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Across
  1. 3. The number of stripes on the US flag
  2. 5. The oldest national park in the world
  3. 10. One of the Great Lakes
  4. 12. The most famous waterfalls in North America
  5. 13. Honolulu, the capital of Hawaii, is situated on this island
  6. 14. An extensive chain of mountains in North America
  7. 15. The national bird of the USA
Down
  1. 1. A neighbouring country of the USA
  2. 2. The highest mountain top in the USA
  3. 4. The Grand Canyon is carved by this river
  4. 6. A national park in the USA rich in alligators
  5. 7. A significant percentage of this natural phenomenon occurs in the USA
  6. 8. The third most populated city in the US
  7. 9. This man's name was given to the capital of the USA
  8. 11. The largest US state in area