From Fort Knox to the LDS Church's vaults in Little Cottonwood Canyon to the underground nuclear shelter at The Greenbrier, take a look at eight sites throughout the world that are or were heavily guarded.
Federal Reserve Bank, New York
In addition to other treasures, the Federal Reserve Bank stores gold belonging to the U.S and foreign governments, other banks and international organizations in its basement, according to the Federal Reserve Bank's website.
About 530,000 gold bars, weighing roughly 6,700 tons, were in the vault as of 2012.
Every compartment in the vault is secured by a padlock, two combination locks and a seal by the auditor.
Two New York Fed gold vault staff members and one internal audit staff member need to be in attendance when gold is moved or a vault compartment is opened.
A 90-ton, 9-foot-tall cylinder made from steel is at the vault's only entrance. It sits inside a frame made from steel and concrete that can create a seal that is air- and watertight.
Once this is closed, four rods made of steel are placed inside holes in the cylinder and timers are set, keeping the vault locked until the next business day.
This is just the beginning of the vault's security measures. For more information, visit the Federal Reserve Bank of New York's website.