A granite capstone lies over a chamber (containing a titanium box) carved in 1998 in the floor of the Hall of Records at Mt. Rushmore. The box beneath the capstone contains sixteen porcelain enamel panels. On these panels are written the words of the Constitution, the Declaration of Independence, a history of how and why Mount Rushmore was carved, a history of the four presidents with quotes from each, a biography on Gutzon Borglum, and the history of the United States. The inscription on the capstone comes from Gutzon Borglum's speech at the 1930 dedication of the Washington figure.

A granite capstone lies over a chamber (containing a titanium box) carved in 1998 in the floor of the Hall of Records at Mt. Rushmore. The box beneath the capstone contains sixteen porcelain enamel panels. On these panels are written the words of the Constitution, the Declaration of Independence, a history of how and why Mount Rushmore was carved, a history of the four presidents with quotes from each, a biography on Gutzon Borglum, and the history of the United States. The inscription on the capstone comes from Gutzon Borglum's speech at the 1930 dedication of the Washington figure.