Add Yahoo as a preferred source to see more of our stories on Google. What if Cincinnati's old subway tunnels became an underground food hall and art market? Or canals for kayaking? Or speakeasy spots ...

The city of Cincinnati never finished building its subway in the 1920s, a decision that has long been second-guessed. The subway tunnel not only sits empty but costs city taxpayers money to maintain.

What if Cincinnati's old subway tunnels became an underground food hall and art market? Or canals for kayaking? Or speakeasy spots? The city asked for ideas on what to do with the unused subway ...