Rapid City, South Dakota City had survived a boom and bust and was establishing itself as an important regional trade center for the upper midwest. Although the Black Hills became a popular tourist destination in the late 1890s, it was a combination of local efforts, the popularity of the automobile, and construction of improved highways that brought tourists to the Black Hills in large numbers after World War I. Gutzon Borglum, already a famous sculptor, began work on Mount Rushmore in 1927 and his son, Lincoln Borglum, continued the carving of the presidents' faces in rock following his father's death in 1941. The work
Gutzon Borglum sculpted the memorial "Start Westward of the United States", which is located in Marietta, Ohio (1938). He built the statue of Daniel Butterfield at Sakura Park in Manhattan (1918). He created a memorial to Sacco and Vanzetti (1928), a plaster cast of which is now in the Boston Public Library. Another Borglum design is the North Carolina Monument on Seminary Ridge at the Gettysburg Battlefield in south-central Pennsylvania. The cast bronze sculpture depicts a wounded Confederate officer encouraging his men to push forward during Pickett's Charge. Borglum had also made arrangements for an airplane to fly over the monument during