The Mount Rushmore National Memorial is a colossal sculpture carved into the granite face of Mount Rushmore in the Black Hills near Keystone, South Dakota, United States. It features the 60-foot-tall heads of four United States presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln, chosen to represent the nation’s birth, growth, development and preservation, respectively. The sculpture was designed by Gutzon Borglum and executed from 1927 to 1941 with the help of his son, Lincoln Borglum. The memorial park covers 1,278 acres and attracts more than two million visitors annually. The sculpture is built on land that was illegally taken from the Sioux Nation in the 1870s and is still disputed by them.