Keystone, South Dakota
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Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 240 at the 2020 census. It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving the needs of the millions of visitors to the Mount Rushmore National Memorial, which is located just beyond the town limits. Keystone was heavily damaged in the 1972 Black Hills flood.
Business district in Keystone (March 2012)
Rock Sculpture of Mount Rushmore
Mount Rushmore
The National Presidential Wax Museum, a private museum in Keystone
Carrie Ingalls
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Caroline Celestia Ingalls Swanzey was the third child of Charles and Caroline Ingalls, and was born in Montgomery County, Kansas. She was a younger sister of Laura Ingalls Wilder, who is known for her Little House books.
Surveyors' House, first home in Dakota Territory of the Charles Ingalls family
De Smet School, first school in De Smet and attended by Carrie Ingalls and her older sister, Laura