This is a stereograph showing a train on a railroad trestle bridge near Fort Harker, Kansas. The photo was taken 500 miles west of St. Louis, Missouri, near present day Kanopolis, Kansas. It is from Alexander Gardner's series, Across the Continent on the Union Pacific Railway, Eastern Division.
Kansas Memory
Kansas Historical Society
Trestle bridge near Fort Harker, Kansas. 500 miles west of St. Louis Mo. - 1