The Pottawattamie County Jail is also known as Squirrel Cage Jail is located in Council Bluffs, Iowa.  It's built like a giant Lazy Susan and the cells are pie shaped.  There is a single door on all 3 levels, but you need to use a hand crank to spin the jail and line it up.  Some very infamous prisoners served time in this jail, including Jake Bird, also known as the Tacoma Ax-killer.  It's rumored that Jake put a hex on people and now he haunts the jail.

Website: Drinking The Cool Aid
Resources:

• A Haunted History of the Squirrel Cage Jail - Blog - Unleash Council Bluffs (unleashcb.com)
• Mobile paranormal (thehistoricalsociety.org)
• The Squirrel Cage Jail - Petticoats & Pistols (petticoatsandpistols.com)
• Squirrel Cage Jail, Council Bluffs, Iowa (roadsideamerica.com)
• Iowa's Infamous Squirrel Cage Jail | Iowa Public Radio
• History Goes Bump In The Night: Ep. 284 - Squirrel Cage Jail
• Pottawattamie Squirrel Cage Jail – Council Bluffs, Iowa - Atlas Obscura
• Squirrel Cage Jail – Haunted Houses
• This Jail In Iowa Has a Dark And Evil History (onlyinyourstate.com)
• Youtube-Iowa Culture: Squirrel Cage Jail in Council Bluffs 
• Ghost Adventures-Serial Killer Spirits: Axe Killer Jail