Queen City Underground Tour. Enjoy a stroll through the Gateway District, home to America's largest set of historical landmarks. Visit buildings that were home to over 130 saloons, bars and beer gardens, and theaters that hosted iconic entertainers Charlie Chaplin and Wild Bill Hickok. Descend below the city streets to a hidden burial vault and explore newly discovered tunnels vital to Cincinnati's brewery heritage.
The Underground tours!!! So cool and spooky. Not sure about this particular company, but in general totally worth doing. Underground opium dens, prostitution, speakeasies and shanghaiing (see : http://en.wikipedia.org/wiki/Shanghaiing).