Cincinnati built a subway system its never used

Got this one off Fark..apparently in the early 1900's the Cincinnati used a system of canals to transport goods around the city. When trains became the norm however someone got the idea of converting some of those canals to into underground rail. Quiet a bit of it got built before the war and city politics causes delay after delay. Now the land is used for parks, except for the underground part which is locked up and home to who knows what government secrets.