Cincinnati, OH is infamously known as the home of the longest abandoned subway tunnel in the United States. Local historian Jacob Mecklenborg, author of Cincinnati's Incomplete Subway - The Complete History, will present on the project's genesis, construction, and abandonment, as well as 1930s-era proposals to convert the unused rapid transit line for use by the Cincinnati Street Railway. The presentation will include new photos and other information collected since the book's publication in 2010.