After my Alcatraz post, I have seen this article called “Prisons of the world” in “deputydog“. The blogger did some research about prisons out of curiosity.

1. World’s most valuable prison – San Quentin State Prison, California
2. World’s smallest prison – Sark Prison, Sark, Guernsey
3. World’s most secure prison – Adx Supermax, Florence, Colorado
4. World’s strangest prison – San Pedro, Bolivia
5. World’s best-looking prison – Leoben Justice Centre, Steiermark, Austria
6. World’s most famous prison – Alcatraz / The Rock, San Francisco Bay, California
7. World’s most overcrowded prison – Kresty Prison, St. Petersburg, Russia