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SOURCES – 12 U.S. landmarks with secret design features

The following sources were consulted in the preparation of the article “12 U.S. landmarks with secret design features.”

  1. Hall of Records
  2. Grand Central Terminal Whispering Gallery
  3. The Point of the Matter
  4. Lincoln Memorial Rehabilitation
  5. Dick Bowser and the Arch’s Unique Tram System
  6. The Story of Hoover Dam
  7. Brooklyn Bridge Fallout Shelter
  8. Capitol Crypt
  9. Constructing Liberty
  10. Luke, I Am Your… Gargoyle?: How Darth Vader Came to the National Cathedral
  11. A Greater Eye to Convenience
  12. 10 Secrets of the New York Public Library at 42nd Street