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1. It holds tons of gold — literally

Fort Knox currently houses 147.3 million ounces of gold. The government says the bullion has a "book value" of $6.22 billion.

However, that's based on a fixed price that officials set in 1973. Based on the current market value of gold, the reserves at Fort Knox are worth a far more impressive $273.7 billion, roughly speaking.

Much of the gold in the vault is in the form of 27-pound bars, while a percentage is in gold coins.

At one time, the point of having all of that gold was to provide backing for U.S. currency — but the dollar was taken off the gold standard in 1971.

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2. Is the gold really in there?

So why does the U.S. hang onto its gold stash?

"Just in case we need it," is the explanation a former Federal Reserve Board chairman reportedly gave.

Conspiracy theorists have insisted that the government secretly sold off the gold and that the gold bars are actually tungsten bricks painted to look like the precious metal.

There's no way for outsiders to say with absolute certainty if there's really bullion — or if it's all bull. Over the years, there have been few audits to test the gold, or inventories to count it.

3. Outsiders rarely get inside

In 2017, Treasury Secretary Steve Mnuchin led a rare visit by outsiders to peek at the gold reserves inside the Fort Knox vault.

He was accompanied by Senate Majority Leader Mitch McConnell, and the two of them were photographed holding gold bars.

Afterward, Mnuchin had an answer for the conspiracy mongers. "Glad gold is safe!" he tweeted.

The last time Fort Knox had opened its vault to civilians was more than 40 years earlier.

During her tenure as Director of the U.S. Mint, Mary Brooks led a tour of the vault for members of Congress and the news media in 1974. U.S Treasury Secretary William E. Simon allowed the visit in an effort to quell rumors that all the gold had been removed from the vaults.

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4. Only one U.S. president ever got inside

President Franklin Roosevelt commissioned the construction of Fort Knox in the mid-1930s, reportedly because the Treasury worried that U.S. gold reserves weren't safe from an enemy invasion.

Later, Roosevelt became the only U.S. president ever to set foot inside the gold vault’s titanic walls.

He traveled to Fort Knox to make an inspection in 1943, about seven years after construction on the vault was completed.

5. It's one beefy building

Fort Knox contains 4,200 cubic yards of concrete, 16,000 cubic feet of granite, 750 tons of reinforced steel and 670 tons of structural steel. The cost of construction in the 1930s was a mere $560,000.

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The roof is said to be bomb-proof, and the main vault door weighs 20 tons and is 21 inches thick. The Treasury says no one person knows the entire combination.

The door is resistant to torches, drills and explosives — not that any of that matters. The real challenge to any would-be intruder is reaching the building in the first place.

6. Guards and more guards

Fort Knox is guarded by members of the U.S. Mint Police, one of the oldest federal law enforcement agencies. It was established in 1792.

The officers undergo 12 weeks of basic training, followed by five weeks of field training. They learn a long list of heavy-duty skills, including weapons handling, cornering, door entry and room clearing.

If that doesn't seem intimidating enough, Fort Knox sits at the center of a 109,000-acre U.S. Army post and is a training ground for military troops from around the country.

7. A frail foreign visitor

Occasionally, the vault at Fort Knox has held other precious items, besides gold.

In 1939, one of the original copies of the Magna Carta — the Medieval English charter laying down basic human rights — was brought to the U.S. to go on exhibit at the New York World's Fair.

When World War II erupted, the delicate document was transferred to Fort Knox for safekeeping. The Magna Carta stayed in residence until 1947, when it went back to England.

But for a time, it had some treasured American roommates.

8. Very special guests from US history

World War II turned Fort Knox into a hotel of sorts for prized papers from both sides of the pond.

Originals of the Declaration of Independence, the Bill of Rights and the U.S. Constitution were moved to the gold vault out of fear that the nation’s capital would be attacked.

As the war wound down, the parchment was returned to its rightful home in Washington, D.C., in 1944. That left some room at Fort Knox for the next priceless guest.

9. Protection for a hallowed headpiece

Legend has it that Hungary's King Coloman, who reigned from 1095 to 1116, declared that the Holy Crown of Hungary, and not the king, was the true ruler of the realm.

During World War II, the crown was whisked out of Hungary to protect it from falling into the clutches of the Nazis or Soviets. It resurfaced in Austria in 1945 and was handed over to American forces.

The U.S. government brought the crown to Fort Knox for safekeeping. It remained there until 1978, when it was returned to Hungary by a delegation led by U.S. Secretary of State Cyrus Vance.

10. America's medicine cabinet

What else has Fort Knox held, besides gold and historic artifacts? How about a hoard of drugs? Morphine sulfate, to be exact.

During the Cold War, the U.S. military wanted to be certain that it had a healthy supply of pain meds in case foreign opium sources ever got cut off. So, in 1955, Fort Knox opened its doors to tons of opium.

The government spent millions refining the stuff into morphine in 1993. It's still stored at Fort Knox, alongside the gold.

That is, if the gold is really there.

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Doug Whiteman Former Editor-in-Chief

Doug Whiteman was formerly the editor-in-chief of MoneyWise. He has been quoted by The Wall Street Journal, USA Today and CNBC.com and has been interviewed on Fox Business, CBS Radio and the syndicated TV show "First Business."


The content provided on Moneywise is information to help users become financially literate. It is neither tax nor legal advice, is not intended to be relied upon as a forecast, research or investment advice, and is not a recommendation, offer or solicitation to buy or sell any securities or to adopt any investment strategy. Tax, investment and all other decisions should be made, as appropriate, only with guidance from a qualified professional. We make no representation or warranty of any kind, either express or implied, with respect to the data provided, the timeliness thereof, the results to be obtained by the use thereof or any other matter.