Wonderland Cave billboard, Route 385, Black Hills, South Dakota
John Margolies Roadside America photograph archive (1972-2008), Library of Congress, Prints and Photographs Division. LC-DIG-mrg-01965 (digital file from original color transparency)View original record at the Library of Congress ↗

ARCHIVE PHOTOGRAPH / mrg 01965 https://hdl.loc.gov/loc.pnp/mrg.01965

Wonderland Cave billboard, Route 385, Black Hills, South Dakota