How Cincinnati tried, and failed, to build one of America’s first subway's article in The Verge.
Abandoned tunnels are often the object of urban legend, but Cincinnati is the site of the country's largest abandoned subway tunnel.
The Cincinnati Subway is a set of incomplete, derelict tunnels and stations for a rapid transit system beneath the streets of Cincinnati, Ohio. It is recognized as the largest abandoned subway tunnel in the United States. It was built in the early twentieth century as an upgrade to the Cincinnati streetcar system, but was abandoned due to escalating costs, the collapse of funding amidst political bickering, and the Great Depression during the 1920s and 1930s. In 1928, the construction of the subway system in Cincinnati was indefinitely canceled.