A hidden vault behind Lincoln's head at Mount Rushmore holds important U.S. documents, but this secret room is closed to the public except for a lucky few.

Think you know Mount Rushmore? From a hidden archive room to unfinished plans, this video uncovers the lesser-known stories behind the stone faces. History just got way more interesting.

Nine Secrets of Mount Rushmore. Hidden chambers, optical illusions, and even a little-known secret concerning the King of Rock and Roll.

Interior Secretary Doug Burgum said he “certainly” believes that there’s enough room on Mount Rushmore for President Trump’s face. Burgum joined Trump’s daughter-in-law and new Fox News ...

Construction of the Mount Rushmore monument began in 1927 and lasted until 1941. Borglum oversaw more than 400 workers with various specialties, including blacksmiths, drillers, and tramway operators.