Squirrel Cage Jail - Iowa
http://www.thehistoricalsociety.org/jail.htm
Council Bluffs, IA
USA
One of three remaining examples of the "Lazy Susan" jails, this three-story brick structure was completed in 1885 and featured a "cage" that rotated to allow jailers a view of all cells from a single vantage point. Listed on the National Register of Historic Places.