The Mystery of Al Capone's Vaults
The Mystery of Al Capone's Vaults is a two-hour American television special that was broadcast live in syndication on April 21, 1986, hosted by Geraldo Rivera. It centered on the opening of a walled-off underground room in the Lexington Hotel in Chicago once owned by the crime lord Al Capone, which turned out to be empty except for debris.
Source: Wikipedia — The Mystery of Al Capone's Vaults (CC BY-SA 4.0)