But Mount Rushmore has a secret. The sculpture, which famously depicts four former US Presidents as 60 foot granite faces, was constructed between 1927 and 1941 under the direction of architect ...

Enter: The Hall of Records at Mount Rushmore. Where the frontal lobe of Abraham Lincoln's brain would be, there is a secret room that contains ... the country's history inside the Hall.

The colossal presidential sculptures of Mount Rushmore stand as an emblem of ... It saw Borglum shift his attention to a secret chamber: the Hall of Records. This hidden vault, carved behind ...