Mount Rushmore National Memorial

This impressive national monument is an enormous sculpture carved out of a shear granite rock face depicting the heads of prominent former US presidents George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919), and Abraham Lincoln (1809–1865). These massive 60-foot (18 m) sculptures took famous American sculptor Gutzon Borglum 14 years to build (along with the help of 400 workers) and were completed in 1941.  They are located within the United States Presidential Memorial that represents the first 150 years of US history.  The entire memorial covers just over 1,275 acres (5.17 km²) at an elevation of about 5,725 feet (1,745 m) above sea level.   It attracts over 2 million visitors each year, and is managed by the National Park Service.