Breakdown:

1. Introduction: The Mystery of the Restricted Grand Canyon
   • Open with the surprising fact that 90% of the Grand Canyon is off-limits to the public, with military services backing the restriction.
   • Pose the central question: Why is such a large portion of one of America’s most iconic landmarks restricted from public access?
2. The 1908 Protection Act: Teddy Roosevelt’s Role
   • Explain how Teddy Roosevelt decided to protect the Grand Canyon from timber and mining operations by designating it a national monument in 1908.
   • Discuss how this decision laid the groundwork for further restrictions and protection of the area, beyond just its natural beauty.
3. The Mysterious Expedition of GE Kincaid and Professor SA Johnson
   • Introduce the story of GE Kincaid and Professor SA Johnson, who organized a final mineral expedition in the Grand Canyon before the area became fully protected.
   • Detail how their journey led them to an unexpected discovery: a man-made cavern entrance with steps, sediment stains that didn’t match the Arizona landscape, and clues of an advanced ancient civilization.
4. The Discovery: An Ancient Underground City
   • Discuss the reported discovery of an underground city that could hold up to 50,000 people, with signs of ancient Egyptian hieroglyphs, granaries, and copper tools.
   • Explore the implications of such a discovery, suggesting that an ancient civilization with connections to Egypt may have existed in Arizona.
5. The Smithsonian’s Denial and Controversy
   • Delve into how, after reporting the findings, GE Kincaid planned to take a larger group and involve the Smithsonian for further exploration.
   • Highlight the Smithsonian’s complete denial of the discovery, labeling it a hoax, and discuss the institution’s controversial history of allegedly covering up certain archaeological findings.
6. Why 90% of the Grand Canyon Remains Off-Limits
   • Analyze the possible reasons behind the government and military’s decision to restrict such a large portion of the Grand Canyon, including theories of protecting ancient secrets or preventing further discovery of advanced ancient civilizations.
   • Discuss how this ties into larger questions about what may be hidden in the canyon and why these secrets continue to be suppressed.
7. Conclusion: The Grand Canyon’s Untold History
   • Conclude by emphasizing the enduring mystery of the Grand Canyon and the possibility that significant historical discoveries may still be hidden within its depths.
   • Encourage readers to reflect on how much of history may remain unknown and how institutions and governments control access to this information.