The notorious Fort Knox in Kentucky is well known to locals. In fact, if you live anywhere in the US, you've probably already heard of it. You may also know that it's one of the safest-kept places on the entire planet. This is due to the obscene amounts of gold stored inside the fort's vault making up a large majority of the US gold's reserves. Yeah, they're hoarding all that treasure in there.
So to prevent any kind of heist, this place has become one of the most heavily secured locations in the entire United States of America.