Like Download 1.19 MB guard tower at Alcatraz 1820 x 2730 pixels Aspect ratio 2:3 Canon PowerShot SX260 HS 13.418 mm f/4.5 1/640 s ISO 100 Online since: 28 October 2019 Taken: 20 June 2014 CC0 / Public Domain tower guard tower alcatraz prison san francisco california metal design