http://www.protrails.com/trail/280/san-francisco-marin-headlands-mt-tamalpais-point-reyes-alcatraz-island-walking-audio-tour
http://www.alcatrazhistory.com/factsnfig.htm
http://rawpixels.ca/wp-content/uploads/2008/02/20080103-_mg_4396.jpg
http://lee. leesaloutos http://lee.leesaloutos.com/Photo%20Logs/2007%2005%20Wyoming/2007%2005%2023,%20Rawlins,%20Wyoming%20Frontier%20Prison.htm
http://hu.wikipedia.org/wiki/Alcatraz-sziget
http://downloadfreedesktopwallpaper-net.carandautoinsurancequote.com/
http://s406.photobucket.com/user/DixieGal47/media/Vacation%202010/San%20Francisco/Alcatraz/Alcatraz008.jpg.html
https://www.flickr.com/photos/michaelpenning/5580760322/
http://www.nps.gov/goga/parkmgmt/alcatraz-fee-program-projects.htm
http://www.thinkhero.com/2011/11/28/new-trailer-for-jj-abrams-alcatraz-video/