http://www.theoccultmuseum.com/29-eerie-photos-of-the-worlds-most-haunted-prisons/?utm_content=bufferaa645&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
https://www.thrillist.com/travel/nation/purposely-spend-the-night-in-a-super-haunted-latvian-prison
https://en.wikipedia.org/wiki/Eastern_State_Penitentiary
https://www.npr.org/2013/10/24/232234570/is-eastern-state-penitentiary-really-haunted
https://en.wikipedia.org/wiki/HM_Prison_Shepton_Mallet
https://www.hauntedhappenings.co.uk/ghost_hunts/Shepton_Mallet_Prison.php
https://www.thesun.co.uk/news/4534871/prison-tour-guide-claims-he-was-burned-by-ghost-of-executed-murderer-inside-the-uks-most-haunted-nick/
https://en.wikipedia.org/wiki/Legends_of_Alcatraz
http://www.discover-latvia.lv/paranormal-activity-in-the-karosta-naval-port-prison-in-liepaja.php
http://www.latvia.travel/en/sight/naval-port-prison
http://www.deadohio.com/mansfieldreformatory.htm
https://en.wikipedia.org/wiki/Tower_of_London
https://www.travelchannel.com/interests/haunted/articles/tower-of-london
http://www.haunted-places-to-go.com/haunted-prison-2.html
https://www.jward.org.au/ghost-tours/
http://realparanormalexperiences.com/ararat-lunatic-asylum-the-haunting
http://www.hauntedhouses.com/states/co/cripple-jail.htm
https://www.thesun.co.uk/living/1807735/my-terrifying-night-in-bodmin-jail-britains-most-haunted-building/
https://en.wikipedia.org/wiki/Bodmin_Jail