Fort Knox, U.S. Bullion Depository

A fortified vault building which is used to store a large portion of United States official gold reserves, as well as from time to time, other precious items belonging to, or entrusted to, the United States of America.

The United States Bullion Depository holds about 4,603 tons (4,176 metric tonnes) of gold bullion (147.399 million troy ounces). It is second in the United States only to the Federal Reserve Bank of New York's underground vault in Manhattan, which holds about 5,000 metric tons of gold in trust for many foreign nations, central banks and official international organizations.