us marks

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Across
  1. 3. / Huge dam on the Colorado River
  2. 5. / Deep blue lake formed in a volcanic crater
  3. 9. / Where the U.S. Congress meets
  4. 12. / Famous green monument in New York Harbor
  5. 13. / Monument with four presidents carved into a mountain
  6. 16. / Island prison once home to famous inmates
  7. 17. / Historic immigration station in New York
  8. 18. / Cracked symbol of American independence
  9. 21. / Home and office of the U.S. President
  10. 24. / Powerful group of waterfalls on the U.S.-Canada border
  11. 25. / Futuristic tower in Seattle
Down
  1. 1. / California park known for cliffs and waterfalls
  2. 2. / Monument honoring the 16th president
  3. 4. / Utah park with unique rock formations
  4. 6. / Tall obelisk in honor of the first president
  5. 7. / Giant white letters on a California hillside
  6. 8. / Tall New York skyscraper with city views
  7. 10. / Where the Declaration of Independence was signed
  8. 11. / Deep, vast natural gorge in Arizona
  9. 14. / Bright, busy area in New York known for lights and ads
  10. 15. / First national park, famous for geysers and wildlife
  11. 19. / Iconic red bridge in San Francisco
  12. 20. / U.S. military headquarters with five sides
  13. 22. / Historic mission where Texans fought for independence
  14. 23. / Giant arch symbolizing the westward expansion