Fort Knox is located between Louisville and Elizabethtown, Kentucky. The base was established in 1918, near the site of fortifications that were built during the Civil War. Since 1937, Fort Knox has served as the site for the U.S. Treasury's gold bullion depository.
The depository at Fort Knox is estimated to contain 3 percent of all the gold mined in human history. Even though the name has become synonymous with a vault of gold, Fort Knox is actually second to the Federal Reserve Bank of New York, whose vaults contain approximately 7,000 metric tons of gold for domestic and international depositors.