http://www.therichest.com/rich-list/12-of-the-cushiest-prisons-in-the-world/
http://www.topteny.com/top-10-worlds-most-luxurious-prisons/
http://grabhouse.com/urbancocktail/most-luxurious-prisons-in-the-world-where-inmates-live-better-than-us/
https://en.wikipedia.org/wiki/Bast%C3%B8y_Prison
https://www.theguardian.com/world/2013/sep/27/chile-closes-luxury-prison-pinochet-cordillera
https://en.wikipedia.org/wiki/Halden_Prison
http://www.rtoz.org/2013/11/11/sweden-is-closing-many-prisons-due-to-lack-of-prisoners/