5. Bank of England Vault
The Bank is custodian to the official gold reserves of the United Kingdom and many other countries.
The vault, beneath the City of London, covers a floor space greater than that of the third-tallest building in the City,Tower 42, and needs keys that are three feet long and a voice recognition computer system to open.
As at around 2011, the Bank was the 15th-largest custodian of gold reserves, holding around 4600 tonnes. These gold deposits were estimated in February 2012 to have a current market value of £156,000,000,000.
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