Sewer Worker Followed An Old Drain – And Found Something That He Wasn’t Supposed To See At The End

12. Only A Key?

Using only a key to access such a treasure would be quite risky but when you learn that the key measures more than 10 feet long you realize that it must be very hard to break in. On top of this, you have to use a spoken keyword which is analyzed with vocal recognition software and if it’s a 100% pass, the vault’s door opens.