13th Annual Smithsonian Magazine Photo Contest Travel
Blow Your Horn, Alcatraz

This is an intriguing sign above and even more intriguing tunnel on Alcatraz.

Photo Detail
Date Taken: 11.2013
Date Uploaded: 11.2015
Photo Location: San Francisco, California, United States of America
Camera: Canon PowerShot SD850 IS
Copyright: © Samantha Formicola