Mount Rushmore in the United States was declared a national monument in 1925. The most interesting fact is that this was declared a national monument even before a construction began in 1927. It is located in south western Dakota in the Black Hills. Faces of U.S. presidents are carved into the rock of these hills. There are figures of George Washington, Thomas Jefferson, Abraham Lincoln and Theodore Roosevelt. President faces are engraved at about 150 meters above the valley, which lies next to the rock, and height of each carved face is about 20 meters. The cost for the whole project was a million dollars, which is a small sum for the cultural value of this monument. An American historian Dan Robinson gave the idea for this monument and the project work was conducted by sculptor Gutzon Borglum, who died in 1941 before the completion of the monument, but his son finished his father’s work. The monument is located near the Borglum studio, which is a sort of mini museum that includes tools used for building a monument.