Metropolitan Correctional Center Chicago (Chicago)

The Metropolitan Correctional Center is a 27 story triangular federal jail and prison, built in 1975. It has an exercise yard on its roof, but don't get any ideas about a helicopter breakout; the yard is protected by a meshwork of high-strength chains.

www.bop.gov/locations/institutions/ccc/index.jsp
www.encyclopedia.chicagohistory.org/pages/11145.html