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Across
  1. 1. SF's red span
  2. 4. National park in D.C.
  3. 5. Plymouth landing site
  4. 8. Lincoln's D.C. statue
  5. 9. Arizona's vast chasm
  6. 11. Philadelphia hall
  7. 14. Carved presidents' faces
  8. 15. Texas battle fort
  9. 17. Seattle's skyline icon
  10. 19. Hawaii's active volcano
  11. 20. Famous American waterfall
  12. 21. First national park
  13. 25. New York's iconic statue
Down
  1. 2. Iconic California bridge
  2. 3. D.C.'s tall obelisk
  3. 6. Colorado River dam
  4. 7. Congress building
  5. 10. St. Louis's famous arch
  6. 12. St. Louis gateway
  7. 13. Defense HQ
  8. 16. Memorial honoring a president
  9. 18. D.C.'s central park
  10. 22. NYC statue from France
  11. 23. President's residence
  12. 24. Civil War battlefield