When you see the National Memorial in pictures you do not really get an understanding of the true enormity of the construction. Covering 5.17km₂, the granite sculpture, built to represent the first 130 years of the history of the United States was created by Gutzon Borglum and 400 workers over a 14 year period.
The original design of the monument was intended to show the presidents from head to waist but due to a lack of funding, the construction had to end in late 1941.
A little known fact about the sculpture is that directly behind it sits a chamber cut 21m into the rock. It contains a vault with sixteen porcelain panels. The panels include the text of the Declaration of Independence and the Constitution. This chamber was created as the entrance-way to a planned “Hall of Records.