The subway tunnel not only sits empty but costs city taxpayers money to maintain. Now, the city is asking for ideas about what to do with the tunnel. "The city is seeking conceptual proposals to ...

More: Cincinnati exploring options to use never-completed subway tunnel Despite headwinds ... leaving the tunnels truly empty for the first time in 70 years. Cincinnati has a window to look ...

Residents, design experts and transit advocates weigh in on whether Cincinnati should build a function subway in its abandoned tunnel system.

You know, there’s a lot of potential into it." The subway tunnel, which the city tells WCPO needs "a lot" of work, not only sits empty but continues to cost taxpayers money to maintain.

It was built in the mid-1920s with the intention of becoming a fully operational subway system, but the project was never finished and the tunnel has been sitting there, empty, for decades.

Before looking at the present day, it is important to tell the story of why Cincinnati is home to the country's largest abandoned subway tunnel by ... the tunnels truly empty for the first time ...